#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> a;
    vector<int> b;
    string s;
    cin >> s;
    for (char c : s) {
        a.push_back(c == 'o' ? 0 : 1);
    }
    b.push_back(1);
    rep(i, n - 1) {
        if ((a[i] == a[i + 1]) == (b.back() == 1)) {
            b.push_back(0);
        } else {
            b.push_back(1);
        }
    }
    auto f = [&](vector<int> x) {
        vector<int> y(n + 1, 0);
        rep(i, n) {
            if (x[i] == 0) {
                y[0]++;
                y[i + 1]--;
            } else {
                y[i]++;
                y[n]--;
            }
        }
        rep(i, n) y[i + 1] += y[i];
        rep(i, n) {
            if (a[i] % 2 != y[i] % 2)
                return false;
        }
        return true;
    };
    if (f(b)) {
        cout << "Yes" << endl;
        for (int i : b) {
            cout << (i == 0 ? 'L' : 'R');
        }
        cout << endl;
        return 0;
    }
    for (int &i : b)
        i ^= 1;
    if (f(b)) {
        cout << "Yes" << endl;
        for (int i : b) {
            cout << (i == 0 ? 'L' : 'R');
        }
        cout << endl;
        return 0;
    }
    cout << "No" << endl;
    return 0;
}