using System;

public class Hello
{
    static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        getAns(n);
    }
    static void getAns(int n)
    {
        var t = new int[] { 720, 360, 180, 30, 6, 1 };
        var t2 = new char[] { 'C', 'M', 'S', 'R', 'o', '.' };
        var p = 0;
        var ans = "";
        while (p < 6)
        {
            while (true)
            {
                if (n >= t[p]) { ans += t2[p]; n -= t[p]; }
                else break;
            }
            p++;
        }
        Console.WriteLine(ans);
    }
}