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

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

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

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

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