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