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

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

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

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

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