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

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

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

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

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