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File 1 File2 Col 1 Col2 Col3 Col4 Col 1 Col2 Col3 Col4 1 2 3 4 4 3 2 1 ... Line 4: # F1, L4,Cols 2, 3 & 4 match F2, L2, Cols 2, 3 & 4 # and also matches contents of F2, L4, Col3 # Do both satisfy your criteria?