#include <bits/stdc++.h>

using namespace std;

void printShortestPath(int n, int i_start, int j_start, int i_end, int j_end) {
    int i=i_start,j=j_start,z=0,flag=0,a[100];
    while((((i!=i_end)||(j!=j_end))))
    {
        if( !((i<n)&&(i>=0)) || !((j<n)&&(j>=0)) )         
        {
            flag=1;
            break;
        }
        
        else if((i-i_end>0)&&(j-j_end>=0))                   //1
        {
            i=i-2;
            j=j-1;
            a[z]=1;
            z++;
        }
        else if((i-i_end>0)&&(j-j_end<=0))                                          //2
        {
            i=i-2;
            j=j+1; 
            a[z]=2;
            z++;
        }
        else if((i-i_end==0)&&(j-j_end>0))                      //3
        {
            i=i;
            j=j-2;
            a[z]=3;
            z++;
        }
        else if((i-i_end==0)&&(j-j_end<0))                  //4
        {
            i=i;
            j=j+2;
            a[z]=4;
            z++;
        }
        else if((i-i_end<0)&&(j-j_end>=0))                      //5
        {
            i=i+2;
            j=j-1;
            a[z]=5;
            z++;
        }
        else if((i-i_end<0)&&(j-j_end<=0))                          //6
        {
            i=i+2;
            j=j+1;
            a[z]=6;
            z++;
        }
    }
    if(!flag)
    {cout<<z<<endl;
     int k=0;
        while(a[k]!=0)
            {
                switch(a[k]){
                    case 1: {cout<<"UL ";break;}
                    case 2: {cout<<"UR ";break;}
                        case 3: {cout<<"L ";break;}
                        case 4: {cout<<"R ";break;}
                        case 5: {cout<<"LR ";break;}
                        case 6: {cout<<"LL ";break;}
                }
            k+=1;
             }
    }
    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;
}