Sanalista

alphabet = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',\
            'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',\
            't', 'u', 'v', 'w', 'x', 'y', 'z']

answer_number = 0
      
input_number = int(input())

def check(word):
    for i in alphabet:
        count = 0
        for j in word:
            if j == i: 
                count += 1
        if count == 0:
            continue
        elif count % 2 != 0:
            return False
    return True

for i in range(input_number):
    input_word = input()
    if check(input_word):
        answer_number += 1

print(answer_number)
        

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED