#coding: UTF-8

import sys
import re
import itertools
from collections import deque

### defs ###


### main ###
s = sys.stdin.readline()
ans=0
conflg=False
head=0
tail=0
for i in range(len(s)):
	c=s[i]
	if (c=='…'):
		if(conflg==False):
			conflg=True
			head=i
			tail=i+1
		else:
			tail+=1
	else:
		if(conflg==True):
			conflg=False
			ans = max(ans,tail-head)

print (ans)