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