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

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

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

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

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