# yukicoder: No.341 沈黙の期間
# Python3 2019.5.5 bal4u

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from sys import stdin
input = stdin.readline

ans, f = 0, 0
s = list(input())
n = len(s)
for i in range(n):
	if s[i] == '…': f += 1
	else:
		if f > ans:	ans = f
		f = 0
print(ans)