# -*- coding: utf-8 -*-
"""
No.341 沈黙の期間
https://yukicoder.me/problems/no/341

"""
import sys
from sys import stdin
import re
input = stdin.readline


def main(args):
    ans = 0
    S = input().strip()
    mm = re.findall('…+', S)
    for m in mm:
        ans = max(ans, len(m))
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])