S = input()

t = "…"

res = 0
cnt = 0

i = 0

while i < len(S):
    cnt = 0
    if S[i] == t:
        cnt += 1
    while i + 1 < len(S) and S[i] == t and S[i] == S[i + 1]:
        i += 1
        cnt += 1
    res = max(res, cnt)
    i += 1

print(res)