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