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#command cdx cut -f two $TMP/aaa $TMP/bbb #infile aaa CDX one two three aaa bbb ccc ddd eee fff ggg hhh iii #infile bbb CDX zero one two jjj kkk lll mmm nnn ooo ppp qqq rrr #stdout CDX two bbb eee hhh lll ooo rrr