(0 20 9 7 2)(1 8 5)(3 18 4)(6 17 15 13 10)(11 14 12)(16 21 19)
ALLOWS (11/8)-SEQUENCE
1: (0 3 9)
(0 7 2)(1 8 5)(3 20 9 18 4)(6 17 15 13 10)(11 14 12)(16 21 19)
2: (9 18 20)
(0 7 2)(1 8 5)(3 20 4)(6 17 15 13 10)(9)(11 14 12)(16 21 19)(18)
3: (16 21 19)
(0 7 2)(1 8 5)(3 20 4)(6 17 15 13 10)(9)(11 14 12)(16)(18)(19)(21)
4: (6 17 15)
(0 7 2)(1 8 5)(3 20 4)(6 13 10)(9)(11 14 12)(15)(16)(17)(18)(19)(21)