# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = input()
	ans = 0
	ten = 0
	for i in S:
		if i == "…":
			ten += 1
		else:
			ans = max(ans, ten)
			ten = 0

	ans = max(ans, ten)
	print(ans)

if __name__ == '__main__':
	main()