#include<iostream>
#include<stdlib.h>
using namespace std;
int main()
{
	int n;
	cin>>n;
	int stx,sty,endx,endy,count=0;
	cin>>sty>>stx>>endy>>endx;
	if(abs(endy-sty)%2)
	  {
	     cout<<"Impossible";
	     return 0;
      }
      else
      {
      	count+=abs(endy-sty)/2;
	  }
      if((abs(stx-endx)>=abs(endy-sty)/2))
       {
		 if(  (abs(stx-endx)-abs(endy-sty)/2)%2)
		      {
		          cout<<"Impossible";
			     return 0;	
			  }
			  
			  else
			  {
			    count+=	(abs(stx-endx)-abs(endy-sty)/2)/2;
			  }
       }
      else if((abs(stx-endx)<abs(endy-sty)/2))
	  {
	  	int rem=(-abs(stx-endx)+abs(endy-sty)/2);
	  	if(rem%2)
	  	 {
		          cout<<"Impossible";
			     return 0;	
	     }
	     
	    
	    	
	  	
	  	
	  } 
	  cout<<count<<endl;
       
	  if(sty>endy)
	  {
	  	
	  	  int up=abs(endy-sty)/2;
	  	if(stx>endx)
	  	  {
	  	  	 int left=abs(stx-endx);
	  	  	 int flg=0,ct=0;
	  	  	 //cout<<left<<endl;
	  	  	 for(int i=1;i<=up;i++)
	  	  	  {
				  cout<<"UL ";
				  left--;
				  if(left==0)
			       {
			       	  flg=i+1;
					  break; 
				   }
				   
				  
		      }
		      if(flg)
		      {
		      	 for(int i=flg;i<=up;)
		      	 {
		      	 	
	  	  	   
				   cout<<"UL ";
				    i++;
				    flg=0;
	                 if(i<=up) 
					  {
					    cout<<"UR ";
					    i++;
					    flg=1;
			          }
	  	         }
	  	  	   if(!flg)
	  	  	     cout<<"R ";
			  }
		      	
			
	  	  else
			{
				   left/=2;
	  	  	for(int i=1;i<=left;i++)
	  	  	  cout<<"L ";
	  	     }
	  	   //cout<<endl;	  
	  	  }
	  	  
		else if(stx<endx)
		  {
		  	 
	  	  	 int rgt=abs(stx-endx);
	  	  	 int flg=0;
	  	  	 //cout<<left<<endl;
	  	  	 for(int i=1;i<=up;i++)
	  	  	  {
				  cout<<"UR ";
				  rgt--;
				  if(rgt==0)
			       {
			       	  flg=i+1;
					  break; 
				   }
				   
				  
		      }
		      if(flg)
		      {
		      	 for(int i=flg;i<=up;)
		      	 {
		      	 	
	  	  	   
				   cout<<"UL ";
				    i++;
				    flg=0;
	                 if(i<=up) 
					  {
					    cout<<"UR ";
					    i++;
					    flg=1;
			          }
	  	         }
	  	  	   if(!flg)
	  	  	    {
					 cout<<"R ";
					 //rgt-=2;
					 
			    }
			  }
		      	
			
	  	  else
			{
			   rgt/=2;	  	  
	  	  	for(int i=1;i<=rgt;i++)
	  	  	  cout<<"R ";
	  	      }
		  		
			}
			else
			{
			  if(stx!=0)
			 {
			   int flg=0;
		  	  
	  	  	 for(int i=1;i<=up;)
	  	  	   {
				   cout<<"UL ";
				    i++;
				    flg=0;
                 if(i<=up) 
				  {
				    cout<<"UR ";
				    i++;
				    flg=1;
		          }
	  	  	   }
	  	  	   if(!flg)
	  	  	     cout<<"R ";
		     }
		     
		     else 
		     {
		     	 int flg=0;
		  	  
	  	  	 for(int i=1;i<=up;)
	  	  	   {
				   cout<<"UR ";
				    i++;
				    flg=0;
                 if(i<=up) 
				  {
				    cout<<"UL ";
				    i++;
				    flg=1;
		          }
	  	  	   }
	  	  	   if(!flg)
	  	  	     cout<<"L ";
			 }
				
				
			}
			
		  	
		  	
		  }
	  	
	  	
	  
	   else if(sty<endy)//move down
	  {
	  	
	  	 
	  	  int up=abs(endy-sty)/2;
	  	if(stx>endx)
	  	  {
	  	  	 int left=abs(stx-endx);
	  	  	 int flg=0;
	  	  	 //cout<<left<<endl;
	  	  	 for(int i=1;i<=up;i++)
	  	  	  {
				  cout<<"LL ";
				  left--;
				  if(left==0)
			       {
			       	  flg=i+1;
					  break; 
				   }
				   
				  
		      }
		      if(flg)
		      {
		      	 for(int i=flg;i<=up;)
		      	 {
		      	 	
	  	  	   
				   cout<<"LR ";
				    i++;
				    flg=0;
	                 if(i<=up) 
					  {
					    cout<<"LL ";
					    i++;
					    flg=1;
			          }
	  	         }
	  	  	   if(!flg)
	  	  	     cout<<"L ";
			  }
		      	
			
	  	  else	  
	  	  {
	  	  	   left/=2;
				for(int i=1;i<=left;i++)
	  	  	  cout<<"L ";
	  	  	  
	  	  }
	  	   //cout<<endl;	  
	  	  }
	  	  
		else if(stx<endx)
		  {
		  	 
	  	  	 int rgt=abs(stx-endx);
	  	  	 int flg=0,ct=0;
	  	  	 //cout<<left<<endl;
	  	  	 for(int i=1;i<=up;i++)
	  	  	  {
				  ct++;
				  rgt--;
				  if(rgt==0)
			       {
			       	  flg=i+1;
					  break; 
				   }
				   
				  
		      }
		      
		      if(!flg)
		      {      rgt/=2;
				  	for(int i=1;i<=rgt;i++)
	  	  	       cout<<"R ";
	  	  	       for(int j=1;j<=ct;j++)
		           cout<<"LR ";
	  	      }
		      else
		      { 
		         
		      for(int j=1;j<=ct;j++)
		           cout<<"LR ";
		      	 for(int i=flg;i<=up;)
		      	 {
		      	 	
	  	  	   
				   cout<<"LR ";
				    i++;
				    flg=0;
	                 if(i<=up) 
					  {
					    cout<<"LL ";
					    i++;
					    flg=1;
			          }
	  	         }
	  	  	   if(!flg)
	  	  	    {
					 cout<<"L ";
					 //rgt-=2;
					 
			    }
			  }
		      	
			
	  	  	  
	  	  
	  	  	
		  		
			}
			else
			{
			  if(stx!=n-1)
			 {
			   int flg=0;
		  	  
	  	  	 for(int i=1;i<=up;)
	  	  	   {
				   cout<<"LR ";
				    i++;
				    flg=0;
                 if(i<=up) 
				  {
				    cout<<"LL ";
				    i++;
				    flg=1;
		          }
	  	  	   }
	  	  	   if(!flg)
	  	  	     cout<<"L ";
		     }
		     
		     else 
		     {
		     	 int flg=0;
		  	  
	  	  	 for(int i=1;i<=up;)
	  	  	   {
				   cout<<"LL ";
				    i++;
				    flg=0;
                 if(i<=up) 
				  {
				    cout<<"LR ";
				    i++;
				    flg=1;
		          }
	  	  	   }
	  	  	   if(!flg)
	  	  	     cout<<"R ";
			 }
				
			}
			
		  	
		  	
	  }
	  
	  else
	  {
	  	
	  	// int up=abs(endy-sty)/2;
	  	  if(stx>endx)
	  	  {
	  	  	 int left=(abs(stx-endx))/2;
	  	  	
	  	  	  
	  	  	for(int i=1;i<=left;i++)
	  	  	  cout<<"L ";
	  	  	  
	  	  	
	  	  	
		  }
		  else if(stx<endx)
		  {
		  	int rgt=(abs(stx-endx))/2;
	  	  
	  	  	  
	  	  	for(int i=1;i<=rgt;i++)
	  	  	  cout<<"R ";
		  }
		 
		  	
		  	
		  }
	  	
	  	
	  
	
	return 0;
}