import sys
import datetime

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines


ans = 0

s = readline().decode().strip()
cnt = 0
for c in s:
    if c == "…":
        cnt += 1
    else:
        ans = max([ans, cnt])
        cnt = 0
ans = max([ans, cnt])
print(ans)