| Systre key | (3, 1, 2, 0, 0, 0, 1, 3, 0, 0, 0, 1, 4, 0, 0, 0, 1, 5, 0, 0, 0, 2, 3, 0, 0, 0, 2, 6, 0, 0, 0, 2, 7, 0, 0, 0, 3, 8, 0, 0, 0, 3, 9, 0, 0, 0, 4, 8, 1, 0, 0, 4, 10, 0, 0, 0, 4, 11, 0, 0, 0, 5, 6, 0, 1, 0, 5, 12, 0, 0, 0, 5, 13, 0, 0, 0, 6, 13, 0, -1, 0, 6, 14, 0, 0, 0, 7, 9, 0, 0, 1, 7, 15, 0, 0, 0, 7, 16, 0, 0, 0, 8, 11, -1, 0, 0, 8, 17, 0, 0, 0, 9, 15, 0, 0, -1, 9, 18, 0, 0, 0, 10, 16, 0, 0, 0, 10, 19, 0, 0, 0, 10, 20, 0, 0, 0, 11, 20, 1, -1, -1, 11, 21, 0, 0, 0, 12, 18, 0, 0, 0, 12, 19, -1, 0, 0, 12, 22, 0, 0, 0, 13, 21, 0, 0, 0, 13, 22, 1, 0, 0, 14, 17, 0, 0, 0, 14, 21, -1, 0, 1, 14, 23, 0, 0, 0, 15, 20, 0, -1, 0, 15, 22, 1, -1, 0, 16, 20, 0, 0, 0, 16, 23, 0, 1, 0, 17, 21, -1, 0, 1, 17, 24, 0, 0, 0, 18, 22, 0, 0, 0, 18, 24, 0, 0, -1, 19, 23, 1, 1, 0, 19, 24, 1, 0, 0, 23, 24, 0, -1, 0) |