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

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

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

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

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