#include <bits/stdc++.h>

using namespace std;

void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    vector<int> unit = {720, 360, 180, 30, 6, 1};
    string cur = "CMSRo.";
    string ans = "";
    for (int i = 0; i < 6; i++) {
        for (int j = 0; j < n / unit[i]; j++) {
            ans += cur[i];
        }
        n %= unit[i];
    }
    cout << ans << endl;
}