4  7  2  < input/lu24
1  4  9  < input/lu357
 4 2 1 < input/dat073
 3 0 2 < input/dat709
9 4 2 < input/add.319
3 3 4 < input/add.85
 4 3 2 < input/dat559
9  4  9  < input/lu441
