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-- coding: utf-8 --
def checkio(data):
return [i for i in data if data.count(i) > 1]
if name == 'main':
assert checkio([1, 2, 3, 1, 3]) == [1, 3, 1, 3]
assert checkio([1, 2, 3, 4, 5]) == []
assert checkio([5, 5, 5, 5, 5]) == [5, 5, 5, 5, 5]
assert checkio([10, 9, 10, 10, 9, 8]) == [10, 9, 10, 10, 9]
print("Coding complete? Click 'Check' to review your tests and earn cool rewards!")