symbols = [
    ('C', 720),
    ('M', 360),
    ('S', 180),
    ('R', 30),
    ('o', 6),
    ('.', 1)
]

result = []
N = int(input())

for symbol, value in symbols:
    count = N // value
    result.append(symbol * count)
    N %= value

print(''.join(result))