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