def represent_balls(N):
    symbols = [
        ('C', 720),
        ('M', 360),
        ('S', 180),
        ('R', 30),
        ('o', 6),
        ('.', 1)
    ]
    
    result = []
    
    for symbol, value in symbols:
        count = N // value
        result.append(symbol * count)
        N %= value
    
    return ''.join(result)

N = int(input())
print(represent_balls(N))