#!/usr/bin/env python3

import sys, re

abba=lambda s:any(m[0]!=m[1] for m in re.findall(r"(.)(.)\2\1",re.sub(r"\[[^]]*\]",",!,!",s)))

print(sum(abba(s) and not any(abba(m) for m in re.findall(r"\[([^]]*)\]",s)) for s in sys.stdin.read().split("\n")[:-1]))