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

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

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

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

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