#include<bits/stdc++.h>
#define UL dp(is-2,js-1)
#define UR dp(is-2,js+1)
#define LR dp(is+2,js+1)
#define LL dp(is+2,js-1)
#define L dp(is,js-2)
#define R dp(is,js+2)
using namespace std;
int ie,je;
int n;
string s;
bool possible(int is, int js)
{
	bool fl = true;
	if(is<0 || is>=n || ie<0 || ie>=n || js<0 || js>=n || je<0 || je>=n) fl = false;
	else if(abs(is-ie)%2 == 0 && is!=ie)
	{
		int x = abs(is-ie)/2;
		if(abs(x-je)%2 != 0 && js!=je) fl = false;
	}
	else if(is==ie) 
	{
		if(abs(js-je)%2 != 0) fl = false;
	}
	else fl = false;
	return fl;
}
int dp(int is, int js)
{
//	cout<<is<<" "<<js<<endl;
	if(is==ie && js==je) return 0;
	int ans = 0;
	if(ie<is)
	{
		if(je<=js) 
		{
			s+="UL ";
			ans+= UL+1;
			
		}
		else 
		{
			s+="UR ";
			ans+=UR+1;
			
		}
	}
	else if(ie>is)
	{
		if(je>=js) 
		{
			s+="LR ";
			ans+=LR+1;
			
		}
		else 
		{
			s+="LL ";
			ans+=LL+1;
			
		}
	}
	else
	{
		if(je>=js) 
		{
			s+="R ";
			ans+=R+1;
			
		}
		else 
		{
			s+="L ";
			ans+=L+1;
			
		}
	}
	return ans;
	
}
int main()
{
	cin>>n;
	int is,js;
	cin>>is>>js>>ie>>je;
	if(!possible(is,js)) cout<<"Impossible"<<endl;
	else
	{
		int ans = dp(is,js);
		cout<<ans<<endl<<s<<endl;
	}
}