import random

def judge(s):
	r = 0
	g = 0
	b = 0
	for i in s:
		if i == 0:
			r += 1
		elif i == 1:
			g += r
		else:
			b += g
	return b

m = int(input())
r = 0
f = 0

for i in range(1, 300000):
	r = i * (i + 1) * (i + 2) // 6
	f = i
	if m <= r:
		break

g = r - m
s = [i%3 for i in range(3 * f)]

# r - i // 2 - popcount(i) = g
# なんかないかな～
v = 1
for i in range(100000):
	if g - v >= 0:
		g -= v
		v += 1
	else:
		break

#print(v)
#print(g)

for l in range(v):
	if v - l - 1 == g:
		pass
	else:
		s[3 * l + 1], s[3 * l + 2] = s[3 * l + 2], s[3 * l + 1]
	
#print(judge(s))

ans = []
for i in s:
	if i == 0:
		ans.append("c")
	elif i == 1:
		ans.append("o")
	else:
		ans.append("n")

print("".join(ans))