#include <stdio.h>
#include <bits/stdc++.h>			

#define pb push_back
#define pf push_front
#define pp pop_back
#define sz(a) (int)(a.size())
#define mp make_pair
#define F first
#define S second
#define next _next
#define prev _prev
#define left _left
#define right _right
#define y1 _y1
#define all(x) x.begin(), x.end()

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int N = (int)1e6 + 123;
const ll INF = (ll)1e18 + 123;
const int inf = (int)1e9 + 123;
const int MOD = (int)1e9 + 7;

void megaRandom() {
	unsigned int FOR;
 	asm("rdtsc" : "=A"(FOR));
  srand(FOR);
}

int n;
pii start, fin;
queue<pii> q;
bool u[511][511];
int d[511][511];

pii dir[] = {{-2, -1}, {-2, 1}, {0, 2}, {2, 1}, {2, -1}, {0, -2}};

bool norm(pii x) {
	if(0 <= x.F && x.F < n && 0 <= x.S && x.S < n && !u[x.F][x.S])
		return 1;
	return 0;
}

pii p[511][511];

int ind(int a, int b) {
	for(int i = 0; i < 6; i ++) 
		if(a == dir[i].F && b == dir[i].S)
			return i;
	assert(0);
}

string ch[] = {"UL", "UR", "R", "LR", "LL", "L"};

string type(int a, int b) {
  //cout << "a: " << a << " b: " << b << "\n";
	for(int i = 0; i < 6; i ++) 
		if(a == dir[i].F && b == dir[i].S)
			return ch[i];
	assert(0);
}

int main() {
	megaRandom();
	cin >> n;
	cin >> start.F >> start.S;
	cin >> fin.F >> fin.S;
	for(int i = 0; i < n; i ++)
		for(int j = 0; j < n; j ++)
			d[i][j] = inf;
	u[start.F][start.S] = 1;
	d[start.F][start.S] = 0;
	q.push(start);
	while(sz(q)) {
		pii x = q.front();
		q.pop();
		for(int it = 0; it < 6; it ++) {
			pii to = {x.F + dir[it].F, x.S + dir[it].S};
			if(norm(to)) {
				u[to.F][to.S] = 1;
				d[to.F][to.S] = d[x.F][x.S] + 1;
				p[to.F][to.S] = x;
				q.push(to);
			}					
		}
	}
	if(d[fin.F][fin.S] == inf) {
		cout << "Impossible";
		return 0;
	}
	vector<string> v;
	while(fin != start) {
		//cout << fin.F << ' ' << fin.S << "\n";
		pii x = p[fin.F][fin.S];
		v.pb(type(fin.F - x.F, fin.S - x.S));
		fin = x;
 	}
 	reverse(all(v));
 	cout << sz(v) << "\n";
 	for(auto xx : v)
 		cout << xx << ' ';
	return 0;         
}