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

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

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

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

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