S = input()
N, Ans, C, I = len('…'), 0, 0, 0
while I + N <= len(S):
    if S[I:I + N] == '…':
        C += 1
        I += N
    else:
        Ans = max(Ans, C)
        C = 0
        I += 1
print(max(Ans, C))