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