#[allow(unused)]
use proconio::{input, marker::Chars};

fn main() {
    input! {
        mut n: usize,
    }
    let a = vec![720, 360, 180, 30, 6, 1];
    let b = vec!['C', 'M', 'S', 'R', 'o', '.'];
    let mut output = String::new();
    for i in 0..6 {
        if i == 5 {
            output += &".".repeat(n);
        }
        else if n >= a[i] {
            output.push(b[i]);
            n %= a[i];
        }
    }
    println!("{}", output)
}