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