from itertools import groupby

def runLengthEncode(S): # list でも str でも OK
    grouped = groupby(S)
    res = []
    for k, v in grouped:
        res.append((k, int(len(list(v)))))
    return res

S = input()
ans = 0
for k, v in runLengthEncode(S):
    if k == '…':
        ans = max(ans, v)
print(ans)