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

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

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

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

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