N = int(input())

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

ret = []
for c, v in d[::-1]:
    u = N // v
    for _ in range(u):
        ret.append(c)
        N -= v

print(''.join(ret))