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

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

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

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

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