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

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

c = count

if count != 0:
	for i in range(count+1):
		if i == 0 and c > 0:
			m = n // pow(1000,c)
			ans += str(m) + ","
			n -= m * pow(1000,c)
			c -= 1
		elif c > 0:
			m = n // pow(1000,c)
			n -= m * pow(1000,c)
			m = str(m)
			while len(str(m)) < 3:
				m += "0"
			ans += str(m) + ","
			c -= 1
		else:
			n = str(n)
			while len(n) < 3:
				n += "0"
			ans += n[-3:]
else:
	print(n)