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

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

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

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

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