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

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

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

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

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