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

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

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

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

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