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

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

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

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

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