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

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

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

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

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