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

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

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

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

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