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