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

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

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

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

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