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