#include <stdio.h>
#include <string.h>

#include <set>
#include <vector>

#define LOG(FMT...) fprintf(stderr, FMT)

#define eb emplace_back

using namespace std;

typedef long long LL;
constexpr int N = 42, B = 21;
constexpr int dx[4] = {-1, 1, 0, 0}, dy[4] = {0, 0, -1, 1};

int n;
char a[N];
bool was[N][N], vis[N][N];
struct Res {
	int x, y;
	Res() {}
	Res(int _x, int _y) : x(_x), y(_y) {}
	bool operator < (const Res &t) const {
		return x != t.x ? x < t.x : y < t.y;
	}
};
set<Res> res;

void dfs(int t, int x, int y) {
	if (t == n) {
		res.emplace(x, y);
		return;
	}
	bool &cur = vis[x + B][y + B];
	bool bacc = cur;
	cur = true;
	int tx = x + dx[a[t]], ty = y + dy[a[t]];
	bool &obs = was[tx + B][ty + B];
	if (!obs) {
		dfs(t + 1, tx, ty);
	}
	if (!vis[tx + B][ty + B]) {
		bool bac = obs;
		obs = true;
		dfs(t + 1, x, y);
		obs = bac;
	}
	cur = bacc;
}

int main() {
	scanf("%d%s", &n, a);
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < 4; ++j) {
			if (a[i] == "LRDU"[j]) {
				a[i] = j;
			}
		}
	}
	dfs(0, 0, 0);
	printf("%ld\n", res.size());
	for (auto [x, y] : res) {
		printf("%d %d\n", x, y);
	}
	return 0;
}