(0 18 15)(1 19 3)(2 7 4)(5 21 20 16 9)(6 17 14 11 8)(10 13 12)
ALLOWS (11/8)-SEQUENCE
1: (0 2 7)
(0 4 2 18 15)(1 19 3)(5 21 20 16 9)(6 17 14 11 8)(7)(10 13 12)
2: (1 19 3)
(0 4 2 18 15)(1)(3)(5 21 20 16 9)(6 17 14 11 8)(7)(10 13 12)(19)
3: (5 21 9)
(0 4 2 18 15)(1)(3)(5)(6 17 14 11 8)(7)(9 20 16)(10 13 12)(19)(21)
4: (6 17 8)
(0 4 2 18 15)(1)(3)(5)(6)(7)(8 14 11)(9 20 16)(10 13 12)(17)(19)(21)