S = input()

max_length = 0
count = 0
prev_ch = ''
for ch in S:

    if ch == '…':
        count += 1

    else:
        if prev_ch == '…':
            max_length = max(count, max_length)
            count = 0

    prev_ch = ch

max_length = max(count, max_length)
print(max_length)