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

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

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

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

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