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a = dict(zip(range(8, 0, -2), range(0, 8, 2))) print(a)
{0: 8, 4: 4, 6: 2, 2: 6}
{8: 0, 6: 2, 4: 4, 2: 6}
{4: 4, 6: 2, 8: 0, 2: 6}
{8: 0, 2: 6, 4: 4, 6: 2}