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

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

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

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

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