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

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

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

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

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