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

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

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

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

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