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

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

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

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

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