s = str(input())
max_ = 0
count = 0
flag = 0
for x in s:
    if x == "…":
        if flag == 0:
            flag = 1
            count = 1
        else:
            count += 1
    else:
        if flag == 1:
            if count >= max_:
                max_ = count
            count = 0
            flag = 0
print(max_)