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

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

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

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

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