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

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

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

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

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