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

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

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

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

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