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