def main():
  from sys import stdin
  readline=stdin.readline
  s = input()
  t = '…'
  ans, cnt = 0, 0
  for i in range(len(s)):
    if s[i] == t:
      cnt += 1
    else:
      ans = max(ans, cnt)
      cnt = 0
  ans = max(ans, cnt)
  print(ans)
main()