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

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

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

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

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