using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var ans = new List<char>();
        var list = new int[] { 720, 360, 180, 30, 6, 1 };
        var s = "CMSRo.";
        for (var i = 0; i < list.Length; ++i)
        {
            while (n >= list[i])
            {
                ans.Add(s[i]);
                n -= list[i];
            }
        }
        WriteLine(string.Concat(ans));
    }
}