#include<bits/stdc++.h>

int main() {
    using namespace std;
    cin.tie(nullptr)->sync_with_stdio(false);
    int N; cin >> N; string S; cin >> S;

    auto get_nxt = [](char c, array<int, 2> cur) -> array<int, 2> {
        if (c == 'U') {
            return {cur[0], cur[1] + 1};
        }
        if (c == 'R') {
            return {cur[0] + 1, cur[1]};
        }
        if (c == 'D') {
            return {cur[0], cur[1] - 1};
        }
        if (c == 'L') {
            return {cur[0] - 1, cur[1]};
        }
        return {0, 0};
    };

    vector<array<int, 2>> path; path.reserve(1 << N);    
    for (int mask = 0; mask < (1 << N); ++mask) {
        map<array<int, 2>, bool> vis;

        array<int, 2> cur = {0, 0};
        bool ok = true;
        vis[cur] = 1;
        for (int x = 0; x < N; ++x) {
            auto nxt = get_nxt(S[x], cur);
            if (mask & (1 << x)) {
                if (vis.count(nxt) > 0) {
                    if (vis[nxt] == -1) ok = false;
                }
                cur = nxt;
                vis[nxt] = 1;
            } else {
                if (vis.count(nxt) > 0) {
                    if (vis[nxt] == 1) ok = false;
                }
                vis[nxt] = -1;
            }
        }
        if (ok) {
            path.push_back(cur);
        }
    }
    sort(path.begin(), path.end());
    path.erase(unique(path.begin(), path.end()), path.end());
    cout << int(path.size()) << '\n';
    for (auto [a, b] : path) {
        cout << a << ' ' << b << '\n';
    }
}