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