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