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