import collections,sys,math,functools,operator,itertools,bisect,heapq,decimal,string,time,random
#sys.setrecursionlimit(10**9)
#sys.set_int_max_str_digits(0)
#input = sys.stdin.readline

#
#alist = []
n = int(input())
x = [720,360,180,30,6,1]
y = 'CMSRo.'
for i in range(6):
    while n >= x[i]:
        print(y[i],end='')
        n -= x[i]