#include<bits/stdc++.h>
#define ll long long
using namespace std;
int main() {
	ll t,n,i,ans,ansh,answ,h,w,x,y,u,v;
	cin>>n;
//	ll a[n+5][n+5];
	cin>>x>>y>>u>>v;
	if(u<x) {
		h=(abs(u-x));
	}
	else {
		h=-abs(u-x);
	}
	if(v<=y) {
		w=-abs(v-y);
	}
	else{
		w=(abs(v-y));
	}
//	cout<<h<<" "<<w<<"%\n";
//	h=x-u;
//	w=y-v;
	if(h==0 && w%2==0) {
		ans=w/2;
		cout<<ans<<"\n";
		if(w>0) {
			ans=w/2;
			cout<<ans<<"\n";
			for(i=0;i<ans;++i) {
				cout<<"R ";
			}
			goto ff;
			//cout<<"\n";
		}
		else if(w<0) {
			ans=abs(w/2);
			cout<<ans<<"\n";
			for(i=0;i<ans;++i) {
				cout<<"L ";
			}
			goto ff;
			//cout<<"\n";
		}
		goto gg;
	}
	else if(w==0 && h%4==0) {
		if(h>0) {
			ans=h/2;
			cout<<ans<<"\n";
			for(i=0;i<ans/2;++i) {
				cout<<"UL UR ";
			}
			//cout<<"\n";
			goto ff;
		}
		else if(h<0) {
			ans=abs(h/2);
			cout<<ans<<"\n";
			for(i=0;i<ans/2;++i) {
				cout<<"LR LL ";
			}
			//cout<<"\n";
			goto ff;
		}
		goto gg;
	}
	else if(h>0 && w>0) {
		ansh=h/2;
		h%=2;
		answ=w-ansh;
		w=answ%2;
		if(h==0 && w==0) {
			cout<<ansh+(answ/2)<<"\n";
			for(i=0;i<ansh;++i) {
				cout<<"UR ";
			}
			for(i=0;i<answ/2;++i) {
				cout<<"R ";
			}
			//cout<<"\n";
			goto ff;
		}
		goto gg;
	}
	else if(h>0 && w<0) {
		ansh=h/2;
		h%=2;
		w=abs(w);
		answ=w-ansh;
		w=answ%2;		
		if(h==0 && w==0) {
			cout<<ansh+(answ/2)<<"\n";
			for(i=0;i<ansh;++i) {
				cout<<"UL ";
			}
			for(i=0;i<answ/2;++i) {
				cout<<"L ";
			}
			//cout<<"\n";
			goto ff;
		}	
		goto gg;	
	}
	else if(h<0 && w>0) {
		h=abs(h);
		ansh=h/2;
		h%=2;
		answ=w-ansh;
		w=answ%2;
		if(h==0 && w==0) {
			cout<<ansh+(answ/2)<<"\n";
			for(i=0;i<ansh;++i) {
				cout<<"LR ";
			}
			for(i=0;i<answ/2;++i) {
				cout<<"R ";
			}
			//cout<<"\n";
			goto ff;
		}
		goto gg;
	}
	else if(h<0 && w<0) {
		h=abs(h);
		w=abs(w);
		ansh=h/2;
		h%=2;
		answ=w-ansh;
		w=answ%2;
		if(h==0 && w==0) {
			cout<<ansh+(answ/2)<<"\n";
			for(i=0;i<ansh;++i) {
				cout<<"LL ";
			}
			for(i=0;i<answ/2;++i) {
				cout<<"L ";
			}
			//cout<<"\n";
			goto ff;
		}	
		goto gg;	
	}
	else {
		gg:
		cout<<"Impossible";
	}
	ff:
	return 0;
}