import sys
import time
import queue
import sys
import codecs


sys.stdin = codecs.open('input.txt', 'r', encoding="utf-8")
s = input()

a = 0
ans = 0
for i in list(s):
    if i == "…":
        a += 1
    else:
        ans = max(a, ans)
        a = 0

print(ans)