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

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

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

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

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