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