#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int N;
    cin >> N;
    vector<int> v={720, 360, 180, 30, 6, 1};
    string S="", T="CMSRo.";
    while(N){
        for (int i=0; i<6; i++){
            if (N >= v[i]){
                S += T[i];
                N -= v[i];
                break;
            }
        }
    }

    cout << S << endl;

    return 0;
}