2  7  10  < input/lu36
2 3 7 < input/inp.99
4  1  6  < input/lu20
 1 1 2 < input/dat050
 3 4 4 < input/dat165
9  2  1  < input/lu53
 3 3 1 < input/dat589
4 2 4 < input/inp.22
