#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n;
    cin>>n;
    int flag=0;
    int j_moves,i_moves,rem_j_moves;
    int moves[500]={0};
    int p=0;
    int i_src,i_dest,j_src,j_dest;
    cin>>j_src>>i_src>>j_dest>>i_dest;
    if((j_src%2) != (j_dest%2))
    {
        cout<<"Impossible\n";
        flag=1;
    }    
    else
    {
        if(abs(j_src-j_dest)%4==0)
        {
            if((i_src%2) != (i_dest%2))
            {
                cout<<"Impossible\n";
                flag=1;
            }
        }
        else
        {
            if((i_src%2) == (i_dest%2))
            {
                cout<<"Impossible\n";
                flag=1;
            }
        }
    }
    if(flag==0){
    if(j_dest<=j_src)
    {
        j_moves=(j_src-j_dest)/2;
        if(i_src<i_dest)
        {
            i_moves=i_dest-i_src;
            if(i_moves>=j_moves)
            {
                for(int i=0;i<j_moves;i++)
                    moves[p++]=2;
                int k=(i_moves-j_moves)/2;
                for(int i=0;i<k;i++)
                    moves[p++]=3;
            }
            
            else if(i_moves<j_moves)
            {
                for(int i=0;i<i_moves;i++)
                    moves[p++]=2;
                rem_j_moves=j_moves-i_moves;
                for(int i=0;i<rem_j_moves/2;i++)
                {
                    moves[p++]=1;
                    moves[p++]=2;
                }   
            }
        }
        
        if(i_src>=i_dest)
        {
            i_moves=abs(i_dest-i_src);
            if(i_moves>=j_moves)
            {
                for(int i=0;i<j_moves;i++)
                    moves[p++]=1;
                int k=(i_moves-j_moves)/2;
                for(int i=0;i<k;i++)
                    moves[p++]=6;
            }
            
            else if(i_moves<j_moves)
            {
                for(int i=0;i<i_moves;i++)
                    moves[p++]=1;
                rem_j_moves=j_moves-i_moves;
                for(int i=0;i<rem_j_moves/2;i++)
                {
                    moves[p++]=1;
                    moves[p++]=2;
                }   
            }
        }
        
    }
    
    else if(j_dest>j_src)
    {
        j_moves=abs(j_src-j_dest)/2;
        if(i_src<i_dest)
        {
            i_moves=i_dest-i_src;
            if(i_moves>=j_moves)
            {
                for(int i=0;i<j_moves;i++)
                    moves[p++]=4;
                int k=(i_moves-j_moves)/2;
                for(int i=0;i<k;i++)
                    moves[p++]=3;
            }
            
            else if(i_moves<j_moves)
            {
                for(int i=0;i<i_moves;i++)
                    moves[p++]=4;
                rem_j_moves=j_moves-i_moves;
                for(int i=0;i<rem_j_moves/2;i++)
                {
                    moves[p++]=4;
                    moves[p++]=5;
                }   
            }
        }
        
        if(i_src>=i_dest)
        {
            i_moves=abs(i_dest-i_src);
            if(i_moves>=j_moves)
            {
                for(int i=0;i<j_moves;i++)
                    moves[p++]=5;
                int k=(i_moves-j_moves)/2;
                for(int i=0;i<k;i++)
                    moves[p++]=6;
            }
            
            else if(i_moves<j_moves)
            {
                for(int i=0;i<i_moves;i++)
                    moves[p++]=5;
                rem_j_moves=j_moves-i_moves;
                for(int i=0;i<rem_j_moves/2;i++)
                {
                    moves[p++]=4;
                    moves[p++]=5;
                }   
            }
        }
        
    }
    cout<<p<<"\n";
    for(int i=0;i<p;i++)
        if(moves[i]==1)
            cout<<"UL ";
    for(int i=0;i<p;i++)
        if(moves[i]==2)
            cout<<"UR ";
    for(int i=0;i<p;i++)
        if(moves[i]==3)
            cout<<"R "; 
    for(int i=0;i<p;i++)
        if(moves[i]==4)
            cout<<"LR "; 
    for(int i=0;i<p;i++)
        if(moves[i]==5)
            cout<<"LL ";
    for(int i=0;i<p;i++)
        if(moves[i]==6)
            cout<<"L ";        
    }    
}