#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main() 
{
    int n,ibeg,iend,jbeg,jend;
    cin>>n>>ibeg>>jbeg>>iend>>jend;
    int temp=0;
    if(ibeg<0||jbeg<0||iend<0||jend<0||ibeg>=n||jbeg>=n||jend>=n||iend>=n)
        temp=-1;
    else
    {
        int mini,maxi,minj,maxj;
        if(ibeg>iend){mini=iend; maxi=ibeg;}
        else{mini=ibeg; maxi=iend;}
        if(jbeg>jend){minj=jend; maxj=jbeg;}
        else{minj=jbeg; maxj=jend;}
        if((maxi-mini)%2!=0)
            temp=-1;
        if(temp==0)
        {
            if(((maxi-mini)/2+maxj-minj)%2!=0)
                temp=-1;
        }
    }
    if(temp==-1)
        cout<<"Impossible";
    else
    {
        int row,col;
        if(ibeg<=iend && jbeg<=jend)
        {
            row=ibeg;
            col=jbeg;
            string str;
            int step=0; 
            while(row<iend)
            {
                if(col<jend)
                {
                    str+="LR ";
                    col++;
                }
                else
                {
                    str+="LL ";
                    col--;
                }
                row+=2;
                step++;
            }
            for(int i=col;i<jend;)
            {
                str+="R "; step++; i+=2;
            }
            cout<<step<<"\n"<<str;
        }
        else if(ibeg<=iend && jbeg>=jend)
        {
            row=ibeg;
            col=jbeg;
            string str;
            int step=0; 
            while(row<iend)
            {
                if(col<jend)
                {
                    str+="LR ";
                    col++;
                }
                else
                {
                    str+="LL ";
                    col--;
                }
                row+=2;
                step++;
            }
            for(int i=col;i>jend;)
            {
                str+="L "; step++; i=-2;
            }
            cout<<step<<"\n"<<str;
        }
        if(ibeg>=iend && jbeg<=jend)
        {
            row=ibeg;
            col=jbeg;
            string str;
            int step=0; 
            while(row>iend)
            {
                if(col<jend)
                {
                    str+="UR ";
                    col++;
                }
                else
                {
                    str+="UL ";
                    col--;
                }
                row-=2;
                step++;
            }
            for(int i=col;i<jend;)
            {
                str+="R "; step++; i+=2;
            }
            cout<<step<<"\n"<<str;
        }
        if(ibeg>=iend && jbeg>=jend)
        {
            row=ibeg;
            col=jbeg;
            string str;
            int step=0; 
            while(row>iend)
            {
                if(col<jend)
                {
                    str+="UR ";
                    col++;
                }
                else
                {
                    str+="UL ";
                    col--;
                }
                row-=2;
                step++;
            }
            for(int i=col;i>jend;)
            {
                str+="L "; step++; i-=2;
            }
            cout<<step<<"\n"<<str;
        }
    }
    cout<<endl;
    return 0;
}