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

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

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

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

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