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

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

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

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

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