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

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

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

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

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