def fun(n):
    t = [
        (".", 1),
        ("o", 6),
        ("R", 30),
        ("S", 180),
        ("M", 360),
        ("C", 720),
    ]
    res = ""
    while len(t) > 0:
        d, n = divmod(n, t[-1][1])
        res += d * t.pop()[0]
    return res


print(fun(int(input())))