#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  string s;
  cin >> s;
  string t(n, '.');
  t[0] = 'L';
  rep(i, n - 1) {
    t[i+1] = s[i] == s[i+1] ? t[i] ^ 'L' ^ 'R' : t[i];
  }
  rep(_, 2) {
    for (char& c : t) c ^= 'L' ^ 'R';
    int left = count(all(t), 'L'), right = 0;
    bool ok = true;
    rep(i, n) {
      if (t[i] == 'L') left--;
      if (!((s[i] == 'o') ^ 1 ^ (left % 2) ^ (right % 2))) {
        ok = false;
        break;
      }
      if (t[i] == 'R') right++;
    }
    if (ok) {
      cout << "Yes\n" << t << '\n';
      return 0;
    }
  }
  cout << "No\n";
}