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