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