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