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

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

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

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

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