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

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

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

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

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