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

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

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

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

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