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

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

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

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

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