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

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

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

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

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