def positions():
    return [
        [(4, 4), (5, 5)],
        [(0, 0), (0, 9)],
        [(0, 4), (0, 5)],
        [(1, 2), (1, 7)],
        [(7, 2), (2, 7)],
        [(3, 2), (6, 7)],
        [(9, 4), (0, 5)],
        [(9, 0), (4, 9)],
        [(7, 3), (0, 6)],
        [(6, 7), (4, 8)],
        [(8, 6), (9, 2)],
        [(4, 3), (3, 1)],
        [(1, 9), (0, 9)],
        [(2, 9), (0, 9)],
        [(9, 9), (3, 9)],
        [(4, 2), (3, 2)],
        [(3, 7), (7, 4)],
        [(6, 6), (1, 4)],
        [(4, 3), (0, 1)],
        [(7, 3), (3, 8)],
        [(3, 5), (5, 2)],
        [(4, 2), (8, 5)],
        [(2, 6), (3, 8)],
        [(4, 0), (4, 9)],
        [(9, 9), (2, 0)],
        [(5, 1), (8, 1)],
        [(5, 2), (2, 2)],
        [(0, 7), (0, 8)],
        [(6, 9), (9, 6)],
        [(2, 9), (9, 4)],
        [(0, 9), (4, 1)],
        [(3, 5), (2, 7)],
        [(6, 2), (7, 4)],
        [(8, 7), (2, 3)],
        [(9, 2), (1, 6)],
        [(9, 4), (1, 1)],
        [(2, 5), (3, 8)],
        [(3, 1), (6, 8)],
        [(7, 0), (1, 9)],
        [(6, 3), (1, 6)],
        [(4, 1), (5, 5)],
        [(5, 9), (0, 6)],
        [(9, 8), (0, 5)],
        [(9, 1), (8, 0)],
        [(7, 0), (1, 9)],
        [(2, 1), (2, 5)],
        [(7, 2), (4, 5)],
        [(9, 2), (5, 6)],
        [(8, 0), (0, 6)],
        [(3, 1), (3, 9)],
    ]