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