#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
long long int n, xs, ys, xe, ye;

bool check()
{
    if(abs(xs-xe)<=1 && abs(ys-ye)<=1 && !(ys==ye && xe==xs))
        return true;
    else
        return false;
}

int main() {
    
    
    cin >> n >> xs >> ys >> xe >> ye;
    int count=0,flag=0, move[1010];
    while(xs != xe || ys != ye)
    {
        if(check()==true)
        {
            flag = 1;
            cout << "Impossible" << endl;
            break;
        }
        else if(xs == xe && ye < ys)
        {   
            count++;
            ys = ys-2;
            move[count] = 6;
        }
        else if(xs == xe && ye > ys)
        {
            count++;
            ys = ys+2;
            move[count] = 3;
        }
        else if(ye <= ys && xe <= xs)
        {
            count++;
            ys-=1; xs -= 2;
            move[count] = 1;
        }
        else if(ye >= ys && xe <= xs)
        {
            count++;
            ys+=1; xs-=2;
            move[count] = 2;
        }
        else if(ye >= ys && xe >= xs)
        {
            count++;
            ys+=1;xs+=2;
            move[count] = 4;
        }
        else
        {
            count++;
            ys -= 1; xs += 2;
            move[count] = 5;
        }
    }
    if(flag == 0)
    {
        int i;
        cout << count << endl;
        for(i=1;i<=count;i++)
        {   
            if(move[i]==1)
                cout << "UL ";
            if(move[i]==2)
                cout << "UR ";
            if(move[i]==3)
                cout << "R ";
            if(move[i]==4)
                cout << "LR ";
            if(move[i]==5)
                cout << "LL ";
            if(move[i]==6)
                cout << "L ";
        }
        cout << endl;
    }
        
    return 0;
}