import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) 
    {
    
        int i,j,k,count=0;
        
        int kr=i_start;
        int kc=j_start;
        int pr=i_end;
        int pc=j_end;
        String s="";
        
        
        
    A:    for(i=0;i<100;i++)
        {
            
            if( ( Math.abs(pr-kr) )%2==0)
            {
                
                if(pr>kr )
                {
                   if(pc==kc)
                   {
                   if(( Math.abs(pr-kr) )%4==0)
                   {
                    
                          int times=  (pr-kr)/4 ;
                       System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {        
                              
                          System.out.print("LR LL ");
                     
                      }
                      break A;
                       
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                          break A;
                       }
                       
                       
                   }
                    
                    
   
                    
                    else if(pc>kc)
                    {
                       
                        for(j=0;j<100;j++)
                        {
                          kc=kc+1;
                          kr= kr+2;  
                         s=s+"LR ";
                      if((kc> (n-1)) ||(kc<0) ||(kr>(n-1))||(kr<0) )
                      {
                          System.out.println("Impossible");
                          break A;
                      }
                            
                            
                            
                            if(kc==pc && kr==pr)
                            {     String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                System.out.println(s);
                                break A;
                            }
                            
                            
                         else if(kr==pr)   
                         {
                             if (( pc-kc )%2==0)
                             {
                              int times=   (pc-kc)/2;
                                 String adi="";
                              for(int vp=0;vp<times;vp++)
                              {
                                 
                                  adi=adi + "R ";
                              }
                                 adi=adi+s;
                               String V[]= adi.split(" ");
                                System.out.println(V.length);
                           
                                 System.out.println(adi);
                                 break A;
                                 
                             }
                             else
                             {
                                 System.out.println("Impossible");
                                 break A;
                             }
                             
                             
                         }
                         
          // ya anhi kiya            
                else  if(pc==kc)
                   {
                   if(( Math.abs(pr-kr) )%4==0)
                   {
                    
                          int times=  (pr-kr)/4 ;
                     //  System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {  
                              if(pc!=(n-1))
                             s=s+ "LR LL ";
                             else
                             s=s+ "LL LR ";
                                 
                         
                     
                      }
                        String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                 System.out.println(s);
                                 break A;
                      
                       
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                          break A;
                       }
                       
                       
                   }   
                            
                //            
                  
                            else if(kc>pc  || kr>pr  )
                        {   
                           System.out.println("Impossible"); 
                           break A;
                            
                        }
                            
                            
                        }
                        
                        
                        
                    }
                    
                  else if(pc<kc)
                    {
                         for(j=0;j<100;j++)
                        {
                          kc=kc-1;
                          kr= kr+2;  
                         s=s+"LL ";
                    
                            if(kc==pc && kr==pr)
                            {
                                String V[]= s.split(" ");
                                System.out.println(V.length);
                                System.out.println(s);
                                
                                break A;
                            }
                            
                            
                         else if(kr==pr)   
                         {
                             if (( kc-pc )%2==0)
                             {
                              int times=   (kc-pc)/2;
                           //     String adi="";  
                              for(int vp=0;vp<times;vp++)
                              {
                                 
                                  s=s+ "L ";
                              }
                                  String V[]= s.split(" ");
                                System.out.println(V.length);
                                 System.out.println(s);
                                 break A;
                                 
                             }
                             else
                             {
                                 System.out.println("Impossible");
                                 break A;
                             }
                             
                             
                         }
              
                             // ya anhii
                             else  if(pc==kc)
                   {
                   if(( Math.abs(pr-kr) )%4==0)
                   {
                    
                          int times=  (pr-kr)/4 ;
                    //   System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {        
                          s=s+"LR LL ";
                     
                      }
                       
                      String V[]= s.split(" ");
                                System.out.println(V.length);
                                 System.out.println(s);
                                 break A;
                       
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                          break A;
                       }
                       
                       
                   }  
                     
                             //yahan tak
                            
                        else if(kc<pc  || kr>pr  )
                        {   
                           System.out.println("Impossible"); 
                           break A;
                            
                        }
                            
                            
                        }
                        
                      
                        
                        
                        
                    }
                    
                    
                }
                
                else if(pr<kr)
                {
                 
                 
                   if(pc==kc)
                   {
                   if(( Math.abs(kr-pr) )%4==0)
                   {
                       int times=  (kr-pr)/4 ;
                         System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {        
                          System.out.print("UL UR ");
                     
                      }
                      break A;
                       
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                      break A; 
                      }
                       
                       
                   }
                    
                    
                    else if(pc>kc)
                    {
                       
                        for(j=0;j<100;j++)
                        {
                          kc=kc+1;
                          kr= kr-2;  
                         s=s+"UR ";
                    
                            if(kc==pc && kr==pr)
                            {     String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                System.out.println(s);
                                break A;
                            }
                            
                            
                         else if(kr==pr)   
                         {
                             if (( pc-kc )%2==0)
                             {
                              int times=   (pc-kc)/2;
                                 
                              for(int vp=0;vp<times;vp++)
                              {
                                 
                                  s=s+ "R ";
                              }
                               String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                 System.out.println(s);
                                 break A;
                                 
                             }
                             else
                             {
                                 System.out.println("Impossible");
                                 break A;
                             }
                             
                             
                         }
                            
               // ye abhi kiya         
                else  if(pc==kc)
                   {
                   if(( Math.abs(kr-pr) )%4==0)
                   {
                       int times=  (kr-pr)/4 ;
                //         System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {        
                          s=s+"UL UR ";
                     
                      }
                       
                   String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                 System.out.println(s);
                                 break A;
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                      break A; 
                      }
                       
                       
                   }
                            
                     //       
                            
                            
                            
                        else if(kc>pc  || kr<pr  )
                        {   
                           System.out.println("Impossible"); 
                           break A;
                            
                        }
                            
                            
                        }
                        
                        
                        
                    }
                    
                    else if(pc<kc)
                    {
                         for(j=0;j<100;j++)
                        {
                          kc=kc-1;
                          kr= kr-2;  
                         s=s+"UL ";
                    
                            if(kc==pc && kr==pr)
                            {
                                String V[]= s.split(" ");
                                System.out.println(V.length);
                                System.out.println(s);
                                
                                break A;
                            }
                            
                            
                         else if(kr==pr)   
                         {
                             if (( kc-pc )%2==0)
                             {
                              int times=   (kc-pc)/2;
                                  
                              for(int vp=0;vp<times;vp++)
                              {
                                 
                                  s=s+ "L ";
                              }
                                  String V[]= s.split(" ");
                                System.out.println(V.length);
                                 System.out.println(s);
                                 break A;
                                 
                             }
                             else
                             {
                                 System.out.println("Impossible");
                                 break A;
                             }
                             
                             
                         }
                            
                     // ye abhi kiya     last     
                else  if(pc==kc)
                   {
                   if(( Math.abs(kr-pr) )%4==0)
                   {
                       int times=  (kr-pr)/4 ;
                //         System.out.println(times*2);
                          for(int vp=0;vp<times;vp++)
                      {  
                          if(kc!=0)
                        {      
                          s=s+"UL UR ";
                        }
                       else
                       {
                         s=s+  "UR UL ";  
                       }
                      }
                       
                   String V[]= s.split(" ");
                                System.out.println(V.length);
                           
                                 System.out.println(s);
                                 break A;
                       
                   }
                      else
                       {
                         System.out.println("Impossible");  
                      break A; 
                      }
                       
                       
                   }
                            
                     //        last
                       
                            
                        else if(kc<pc  || kr<pr  )
                        {   
                           System.out.println("Impossible"); 
                           break A;
                            
                        }
                            
                            
                        }
                        
                      
                        
                        
                        
                    }
                    
                    
                    
                }
                    
               else
               {
                  if( ( Math.abs(pc-kc) )%2==0)
                  {
                      if(pc>kc)
                      {
                        int times=  (pc-kc)/2 ;
                         System.out.println(times); 
                          for(int vp=0;vp<times;vp++)
                      {        
                          System.out.print("R ");
                     
                      }
                      break A;
                      }
                      
                      
                     else if(kc>pc)
                      {
                        int times=  (kc-pc)/2 ;
                         System.out.println(times); 
                         
                          for(int vp=0;vp<times;vp++)
                      {        
                          System.out.print("L ");
                     
                      }
                      break A; 
                      }
                      
                      
                  }
                   
                   else
                   {
                       System.out.println("Impossible");
                   break A;
                   }
                   
               }
                
                
            }
            else
            {
                System.out.println("Impossible");
            break A;
            }
            
            
        }
        
        
    
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int i_start = in.nextInt();
        int j_start = in.nextInt();
        int i_end = in.nextInt();
        int j_end = in.nextInt();
        printShortestPath(n, i_start, j_start, i_end, j_end);
        in.close();
    }
}