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