s = ('a'+input()+'a').split('…')
result, sigh = 0, False
for i in s:
	if i == '':
		if sigh == True:sub = sub + 1
		if sigh == False:sub, sigh = 1, True
	else:
		if sigh == True:result, sigh = max(result,sub), False
print(result+1)