#include <bits/stdc++.h>

using namespace std;

int main() {
    int n,xstart,ystart,xgoal,ygoal,xdist,ydist,x,y,UL=0,UR=0,R=0,LR=0,LL=0,L=0;
    cin>>n>>ystart>>xstart>>ygoal>>xgoal;
    
    xdist=abs(xgoal-xstart);
    ydist=abs(ygoal-ystart);
    
    x=xstart;
    y=ystart;
    
    int minxdistfromy=(ydist%2);
    int maxxdistfromy=(ydist>>1);
    
    if(ydist%2==0 && !((ydist>>1)%2==0 ^ xdist%2==0)){
        vector <string> strarr;
        int count=0;
        
        for(int i=0 ; i<ydist ; i+=2, count++){
            if(x<xgoal){
                if(y<ygoal){
                    LR++;
                    x++;
                    y+=2;
                }
                else {
                    UR++;
                    x++;
                    y-=2;
                }
            }
            else{
                if(y<ygoal){
                    LL++;
                    x--;
                    y+=2;
                }
                else{
                    UL++;
                    x--;
                    y-=2;
                }
            }
        }
        for(x ; x!=xgoal ; count++){
            if(x<xgoal){
                R++;
                x+=2;
            }
            else {
                L++;
                x-=2;
            }
        }
        
        cout<<count<<endl;
        
        for(int i=0 ; i<UL ; i++) cout<<"UL ";
        for(int i=0 ; i<UR ; i++) cout<<"UR ";
        for(int i=0 ; i<R ; i++) cout<<"R ";
        for(int i=0 ; i<LR ; i++) cout<<"LR ";
        for(int i=0 ; i<LL ; i++) cout<<"LL ";
        for(int i=0 ; i<L ; i++) cout<<"L ";
        
    }
    
    else {
        //cout<<ydist<<endl<<xdist<<endl;
        //if(ydist%2==0)cout<<"ydist%2==0\n";
        //if((ydist>>1)%2==0) cout<<"ydist>>1%2==0\n";
        //if(xdist%2==0) cout<<"xdist%2==0\n";
        //if((ydist>>1)%2==0 ^ xdist%2==0) cout <<"((ydist>>1)%2==0 ^ xdist%2==0)\n";
        //if(!((ydist>>1)%2==0 ^ xdist%2==0)) cout<<"!";

        cout<<"Impossible"<<endl;
    }
    return 0;
}