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