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#!/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]))
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