Sanalista

n = input()
counter = 0

for i in range(int(n)):
    word = input()
    samecharacters = 1
    even = 0
    compared = []
    for j in range(len(word)):
        samecharacters = 1
        character = word[j]
        for k in range(len(word)): 
            character2 = word[k] 
            if character == character2 and j != k and character not in compared: 
                samecharacters = samecharacters + 1 
        compared.append(character)

        if (samecharacters % 2) == 0 and (k + 1) == len(word): 
            even = even + 1

    compared = list(dict.fromkeys(compared))
    if even == len(compared):    
        counter = counter + 1                                                                                                           
                                                                                    
print(counter)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED