s = list(input())
r, sigh= 0, False
for i in s:
	if i == '…':
		if sigh:
			sub = sub + 1
			if sub > r:
				r = sub
		else:
			sub, sigh = 1, True
	else:
		if sigh:
			if sub > r:
				r = sub
		sigh = False
print(r)