n = int(input())
count = 0
ans = ""

while n // 1000 > 0:
	count += 1

c = count

for _ in range(count):
	m = n
	m // pow(1000,c)
	if c > 0:
		ans += str(m) + ","
		c -= 1
	else:
		ans += str(m)

if count == 0:
	print(n)
else:
	print(ans)