推荐方案（低过拟合风险）
直选三注
7-3-8
4-6-5
1-9-6
复式组合
3×3×3 [1,4,7] × [3,6,9] × [2,5,8]
4×4×4 [1,4,7,9] × [3,6,9,2] × [2,5,6,8]
5×5×5 [0,1,4,7,9] × [3,6,9,2,5] × [2,5,6,8,0]
6×6×6 [1,4,7,9,3,0] × [3,6,9,2,5,8] × [2,5,6,8,0,4]