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

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

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

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

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