Задание №89600 ЕГЭ Информатике

def y1(nums):
    return len(set(nums)) == 6

def y2(nums):
    counter = 0
    for n in nums:
        if n % 2 == 0: counter += 1

    return counter == 1 

f = open('task-04.txt')
lines = f.readlines() 
f.close() 

cnt = 0 
for row in lines:
    nums = [int(n) for n in row.split()]
    if y1(nums) and y2(nums):
        cnt += 1

print(cnt)