[19:42:44.71] c:\test>head -2 896650.dat
357,67,815,493,516,302,810,899,672,91,542,795,527,429,217,502,811,554,345,312,689,336,710,194,778,869,711,413,402,313,960,351,264,511,558,301,184,414,955,528,44,839,786,363,629,599,611,623,488,534,948,140,489,474,511,662,217,665,58,930,879,683,764,203,863,384,509,5,612,903,0,382,969,240,130,460,652,474,478,562,7,117,360,688,702,657,329,626,521,808,547,477,903,510,913,883,398,201,375,729
675,393,313,605,265,95,415,813,667,95,945,188,2,646,803,534,842,589,299,934,395,429,34,733,684,412,799,463,896,130,896,505,530,669,793,750,527,865,514,55,25,659,668,780,892,119,532,163,707,132,85,841,327,314,408,284,714,166,344,425,165,998,843,272,612,671,873,772,134,665,331,726,356,522,838,22,875,191,835,965,373,304,885,7,586,908,588,623,764,702,4,656,794,289,18,872,639,495,513,35

[19:54:27.66] c:\test>wc -l 896650.dat
  10000 896650.dat

[19:54:40.64] c:\test>896650-2 896650.dat
All lines are unique using a combination of fields:[ 0 1 2 ]

[19:55:10.04] c:\test>