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

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

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

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

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