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

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

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

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

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