def Gauss(n):
    return (n + 1) * (n + 2)//2

M = int(input())
S = set()
for i in range(19999, -1, -1):
    if M >= Gauss(i):
        S.add(i)
        M -= Gauss(i)
ans = []
for i in range(20000):
    if i in S:
        ans.append("con")
    else:
        ans.append("co")
print(*ans, sep="")