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

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

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

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

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