s = ('a'+input()+'a').split('…')
r, sigh, sigh2 = 0, False, False
for i in s:
	if i == '':
		sigh2 = True
		if sigh:sub = sub + 1
		if not sigh:sub, sigh = 1, True
	else:
		if sigh:r, sigh = max(r,sub), False
if sigh2:print(r+1)
else:print(0)