# -*- coding: utf-8 -*-

s = input()
n = len(s)

ans = 0
flag = False
cnt = 0
for i in range(n):
    if flag and s[i] == '…':
        cnt += 1
    elif not flag and s[i] == '…':
        flag = True
        cnt += 1
    elif flag and s[i] != '…':
        flag = False
        ans = max(ans, cnt)
        cnt = 0
ans = max(ans, cnt)
print(ans)