#include<bits/stdc++.h>
using namespace std;
int row[6]={-2,-2,0,2,2,0};
int col[6]={-1,1,2,1,-1,-2};
int res=0,ss=INT_MAX;
vector<int>v,ans;
void dfs(int a,int b,int c,int d,int *vis,int n){
	*(vis+a*n+b)=1;
	if(a==c&&b==d){
		res++;
		if(v.size()<ss){
			ss=v.size();
			ans.assign(v.begin(),v.end());
		}
		return;
	}
	int i,j;
	for(i=0;i<6;i++){
		int da=a+row[i];
		int db=b+col[i];
		if(da<0||da>=n||db<0||db>=n)
		continue;
		if(*(vis+da*n+db)==1)
		continue;
		v.push_back(i);
		dfs(da,db,c,d,(int *)vis,n);
		//return true;
		*(vis+da*n+db)=0;
		v.pop_back();
	}
}
int main(){
	int n,i,j,a,b,c,d;
	cin>>n;
	int vis[n][n];
	memset(vis,0,sizeof(vis));
	cin>>a>>b>>c>>d;
	dfs(a,b,c,d,(int *)vis,n);
	if(res==0)
	cout<<"Impossible";
	else
	{
		cout<<ans.size()<<"\n";
		for(i=0;i<ans.size();i++){
			if(ans[i]==0)
			cout<<"UL ";
			else if(ans[i]==1)
			cout<<"UR ";
			else if(ans[i]==2)
			cout<<"R ";
			else if(ans[i]==3)
			cout<<"LR ";
			else if(ans[i]==4)
			cout<<"LL ";
			else
			cout<<"L ";
		}
	}
	
}