#coding: utf-8
##yuki_341

s=input()

max_c=0
for i in range(len(s)):
 if s[i]=='…':
  j=i
  while j<len(s)and s[j]=='…':
   j+=1
  temp=j-i
  if temp>max_c:
   max_c=temp
  
print(max_c)