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

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

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

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

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