#include <bits/stdc++.h>
#define int long long
using namespace std;

void solve() {
    int n; cin >> n;
    string s; cin >> s;
    s = " " + s;
    int ans = 0;
    for(int i = 1; i <= n; i++) {
        if(s[i - 1] != 'L' && s[i + 1] !='L' && s[i] != 'L') {
            s[i] = 'C';
        }
    }
    for(int i = 1; i <= n; i++) {
        cout << s[i];
    } cout << '\n';
}


signed main() {
	ios::sync_with_stdio(false);
	int tt = 1;
	// cin >> tt;
	while (tt--) {
		solve();
	}
}