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

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

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

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

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