values = [
        [1, 0, 0, 0, 8, 0, 0, 0, 0],
        [0, 0, 0, 0, 0, 0, 4, 0, 3],
        [0, 0, 0, 0, 0, 0, 0, 7, 0],
        [0, 0, 0, 0, 0, 0, 9, 5, 0],
        [0, 6, 0, 3, 0, 0, 0, 0, 0],
        [0, 7, 0, 0, 0, 2, 0, 0, 0],
        [9, 0, 8, 0, 0, 0, 1, 0, 0],
        [5, 0, 0, 4, 0, 0, 0, 0, 0],
        [0, 0, 0, 7, 0, 0, 0, 0, 0]
    ]