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