#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int n,fx,fy,a[1000][1000],mins=0;
string f=""; 
void run(int,int,int*,int*,int move,string);
void solve()
{
    cin>>n;
   int x,y,yco[6]={-1,1,2,1,-1,-2},xco[6]={-2,-2,0,2,2,0},i,j;
    
    for(i=0;i<n;i++)
        for(j=0;j<n;j++)
            a[i][j]=0;
    cin>>x>>y>>fx>>fy;
    a[x][y]=1;
        run(x,y,xco,yco,0,"");
        if(f=="")
           cout<<"Impossible";
        else
            cout<<mins<<endl<<f;
}

int is_safe(int xi,int yi)
{
    if(xi>=0 && yi>=0 && xi<n && yi<n && a[xi][yi]==0)
        return 1;
        return 0;
}


void run(int x,int y,int* xco,int* yco,int move,string m)
{
    int i,j,xi,yi;
    string s[6]={"UL","UR","R","LR","LL","L"};
    
    if(mins<=move && mins!=0)
        return;
    
    if((mins==0 || mins>move) && x==fx && y==fy)
    {
        f=string(m.begin()+1,m.end());
        mins=move;
    }
    
    for(i=0;i<6;i++)
    {
        xi=x+xco[i]; yi=y+yco[i];
        if(is_safe(xi,yi))
        { a[xi][yi]=1;
            run(xi,yi,xco,yco,move+1,m+" "+s[i]);
           a[xi][yi]=0;
        }
    }
    return;
        
}


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    solve();
    
    return 0;
}