#include <bits/stdc++.h>

using namespace std;

string solve (int n , int x , int y , int x1  , int y1 , string ans)
{
    if ( x<0 || y<0 || x>=n || y>=n)
        return "Impossible";
    else if ( x==x1 && y==y1)
        return ans;
    else
    {
        string tmp[6],result;
        int size=INT_MAX;
        tmp[0] =  solve (n,x-2,y-1,x1,y1,ans+"UL ");
        tmp[1] =  solve (n,x-2,y+1,x1,y1,ans+"UR ");
        tmp[2] =  solve (n,x,y+2,x1,y1,ans+"R ");
        tmp[3] =  solve(n,x+2,y+1,x1,y1,ans+"LR ");
        tmp[4] =  solve(n,x+2,y-1,x1,y1,ans+"LL ");
        tmp[5] = solve(n,x,y-2,x1,y1,ans+"L ");
        for ( int i=0;i<6;i++)
        {
            if (tmp[i]!="Impossible")
            {
              if(size>tmp[i].size())
                  result=tmp[i];
              size = result.size();
            }
        }
        return result;
        
    }
}
void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) {
    //  Print the distance along with the sequence of moves.
    //string ans  = solve(n,i_start,j_start,i_end,j_end," ");
    //cout<<ans<<endl;
    if ( abs(i_start-i_end)%2!=0)
        cout<<"Impossible\n";
    else
    {
        int count = abs(i_start-i_end)/2,y;
        int count2 = abs(j_start-j_end);
        if (i_start<i_end)
        {
            string ans;
            int size=0,y;
            if ( count2>=count)
            {
                string ans;
                int size=0,y;
                size+=count;
                if(j_start>j_end)
                {
                    y=j_start-count;   
                    while(count--)
                    {
                        ans+= string("LL ");
                    }
                    
                    
                }
                else if (j_start<j_end)
                {
                    y=j_start+count;   
                    while(count--)
                    {
                        ans+= string("LR ");
                    }
                }
                
                if( (y-j_end)%2==0)
                {
                    int count2=abs(y-j_end)/2;
                    size+=count2;
                    if(y>j_end)
                    {
                        
                        while(count2--)
                        {
                            ans+= string("L ");
                        }
                        
                        
                    }
                    else if (y<j_end)
                    {
                       while(count2--)
                        {
                            ans+= string("R ");
                        }
                    }
                    cout<<size<<endl;
                    cout<<ans<<endl;
                        
                
                        
                }
                else
                    cout<<"Impossible";
                
            }
           
            else
            {
                y = j_start+count2;
                string pp("LR "),pp2("LL "),ans;
                int size=0;
                size+=count2;
                int z=count2;
                if(j_end<j_start)
                {
                   pp="LL ";
                   pp2="LR ";
                    
                   while(z--)
                   {
                       ans+= string(pp);
                   }
                   
                   
                }
                else if (j_end>j_start)
                    while(z--)
                   {
                       ans+= string(pp);
                   }                
                int t=(count-count2)/2;
                while(t--)
                {
                    ans+=(pp+pp2);
                    size+=2;
                }
                if( (count-count2)%2!=0)
                {
                    ans+=pp2;
                    size++;
                    if(pp2=="LL ")
                    y+=-2;
                    else
                    y+=2;
                }
                if (abs(y-j_end)%2==0)
                {
                    int count3=abs(y-j_end)/2;
                    if(y<j_end)
                    {
                       while(count3--)
                        {
                            ans+=string("R ");
                        } 
                    }
                        
                    
                    else
                    {
                      while(count3--)
                        {
                            ans+=string("L ");
                        }
                       
                    }
                   
                    size+=abs(y-j_end);
                    cout<<size<<endl;
                    cout<<ans<<endl;
                }
                else
                    cout<<"Impossible";
                
            }
            
        }
        else if (i_start>i_end)
        {
            if ( count2>count)
            {
                string ans;
                int size=0,y;
                size+=count;
                if(j_start>j_end)
                {
                    y=j_start-count;   
                    while(count--)
                    {
                        ans+= string("UL ");
                    }
                    
                    
                }
                else if (j_start<j_end)
                {
                    y=j_start+count;   
                    while(count--)
                    {
                        ans+= string("UR ");
                    }
                }
                
                if( (y-j_end)%2==0)
                {
                    int count2=abs(y-j_end)/2;
                    size+=count2;
                    if(y>j_end)
                    {
                        
                        while(count2--)
                        {
                            ans+= string("L ");
                        }
                        
                        
                    }
                    else if (y<j_end)
                    {
                       while(count2--)
                        {
                            ans+= string("R ");
                        }
                    }
                    cout<<size<<endl;
                    cout<<ans<<endl;
                        
                }
                else
                    cout<<"Impossible";
            }
            else
            {
                y = j_start+count2;
                string pp("UL "),pp2("UR "),ans;
                int size=0,t;
                size+=count2;
                if(j_end>j_start)
                {
                   t=(count-count2)/2;
                   while(t--)
                   {
                        ans+=(pp+pp2);
                        size+=2;
                   }
                   pp="UR ";
                   pp2="UL ";
                   int z=count2;
                    while(z--)
                    {
                        ans+=string(pp);
                    }
                   
                   
                }
                else if (j_end>j_start)
                {
                    int z=count2;
                    while(z--)
                    {
                        ans+=string(pp);
                    }
                    t=(count-count2)/2;
                    while(t--)
                    {
                        ans+=(pp+pp2);
                        size+=2;
                    }   
                }
                    
                if( (count-count2)%2!=0)
                {
                    ans+=pp2;
                    size++;
                    if(pp2=="UL ")
                    y+=-2;
                    else
                    y+=2;
                }
                if (abs(y-j_end)%2==0)
                {
                    int count3=abs(y-j_end)/2;
                    if(y<j_end){
                    while(count3--)
                    {
                        ans+=string("R ");
                        
                    }  
                    }
                    else{
                    while(count3--)
                    {
                        ans+=string("L ");
                        
                    }  
                    }
                    size+=abs(y-j_end);
                    cout<<size<<endl;
                    cout<<ans<<endl;
                }
                else
                cout<<"Impossible";
            }
        }
        else
        {
            if (j_start>j_end && (j_start-j_end)%2==0)
            {
                count = (j_start-j_end)/2;
                while(count--)
                {
                    cout<<"L ";
                }
            }
            else if (j_start<j_end && (j_end-j_start)%2==0)
            {
                count = abs(j_start-j_end)/2;
                while(count--)
                {
                    cout<<"R ";
                }
 
            }
            else
                cout<<"Impossible";
                
        }
    }
}

int main() {
    int n;
    cin >> n;
    int i_start;
    int j_start;
    int i_end;
    int j_end;
    cin >> i_start >> j_start >> i_end >> j_end;
    printShortestPath(n, i_start, j_start, i_end, j_end);
    return 0;
}