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