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

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

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

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

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