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