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