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