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