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

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

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

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

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