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

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

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

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

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