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

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

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

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

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