aoc2017day04

import sys

def doit(input):
    phrases = list(input.strip().split("\n"))
    sum = 0
    for p in phrases:
        words = p.split()
        invalid = 0
        for i in range(len(words)):
            for j in range(len(words)):
                if j <= i: continue
                if words[i] == words[j]:
                    invalid += 1
        if invalid == 0: sum += 1
    return "%d" % sum
    
input = sys.stdin.read()
print(doit(input))