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

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

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

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

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