#include <iostream>
#include <algorithm>
#include <utility>
#include <limits>
#include <vector>
#include <cstdlib>
using namespace std;
struct boardmove{
    int dx;
    int dy;
    const char* name;
};
const boardmove moves[]={{-1,-2,"UL"},{1,-2,"UR"},{2,0,"R"},{1,2,"LR"},{-1,2,"LL"},{-2,0,"L"}};
bool impossible(int start_x, int start_y, int end_x, int end_y){
    int dy=end_y-start_y;
    if(dy%2!=0)return true;
    int dx=end_x-start_x;
    return (dx-(dy>>1))%2!=0;
}
int measure(int start_x, int start_y, int end_x, int end_y){
    int dy=abs((end_y-start_y)>>1);
    int dx=end_x-start_x;
    return dy+(max(abs(dx)-dy,0)>>1);
}
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin>>n;
    int start_x,start_y,end_x,end_y;
    cin>>start_y>>start_x>>end_y>>end_x;
    if(impossible(start_x,start_y,end_x,end_y)){
        cout<<"Impossible"<<endl;
        return 0;
    }
    vector<const char*> log;
    int dist=measure(start_x,start_y,end_x,end_y);
    while(start_x!=end_x||start_y!=end_y){
        //cout<<start_x<<' '<<end_x<<' '<<start_y<<' '<<end_y<<endl;
        for(int i=0;i<6;++i){
            int t_x=start_x+moves[i].dx;
            int t_y=start_y+moves[i].dy;
            if(t_x>=0&&t_y>=0&&t_x<n&&t_y<n){
                int t_dist=measure(t_x,t_y,end_x,end_y);
                if(t_dist<dist){
                    dist=t_dist;
                    start_x=t_x;
                    start_y=t_y;
                    log.emplace_back(moves[i].name);
                    //cout<<moves[i].name<<endl;
                    break;
                }
            }
        }
    }
    cout<<log.size()<<endl;
    for(const char* x : log){
        cout<<x<<' ';
    }
    cout<<endl;
}