case = 1
while True:
cnt = 0
cnt0 = 0
ans = 0
s = input()
if s[0]=="-":
break
for i in s:
if i == '{':
cnt+=1
else:
if cnt <= 0:
ans+=1
cnt+=1
else:
cnt-=1
ans += cnt//2
print("{}. {}".format(case,ans))
case +=1