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