S = input()
s = [0]
t = 0
s_flg = False
for i in S:
    if i == "…":
        t += 1
        s_flg = True
    elif s_flg == True and i != "…":
        s += [t]
        t = 0
        s_flg = False
else:
    if s_flg == True:
        s += [t]
print(max(s))