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

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

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

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

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