Sanalista

n=int(input())

def is_even(n):
	return n%2==0

words=list()
for i in range(0, n):
	words.append(input())

sum_out=0
for word in words:
	chars = dict()
	has_even = True
	for char in word:
		if not char in chars.keys():
			chars[char] = 0
		chars[char] += 1
	
	for item in chars.items():
		if not is_even(item[1]):
			has_even = False
			break
	
	if has_even:
		sum_out += 1

print(sum_out)
	
	

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED