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

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

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

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

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