a  = list(input())
n = len(a)

if a.count('…') == 0:
    print(0)
    
else:
    mx = 1
    cnt = 1
    for i in range(n-1):
        if a[i] == '…' and a[i+1] == '…':
            cnt += 1
            if cnt >= mx:
                mx = cnt
        else:
            cnt=1
    print(mx)