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

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

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

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

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