def purify_1(numbers):
even = []
for number in range(len(numbers)):
if numbers[number] % 2 == 0:
even.append(numbers[number])
return even
def purify_2(numbers):
even = []
for number in numbers:
if number % 2 == 0:
even.append(number)
return even
print (purify_1([1,2,3]))
print (purify_2([1,2,3,4,5,6]))
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