.TH PREP 1 .SH NAMEprep \- prepare text for statistical processing.SH SYNOPSIS.B prep[.B \-dio]file ....SH DESCRIPTION.I Prepreads each.I filein sequenceand writes it on the standard output,one `word' to a line.A word is a string of alphabetic charactersand imbedded apostrophes,delimited by space or punctuation.Hyphented words are broken apart;hyphens at the end of lines are removed and thehyphenated parts are joined.Strings of digits are discarded..PPThe following option letters may appear in any order:.TP.B \-dPrint the word number (in the inputstream) with each word..TP.B \-iTake the next.I fileas an `ignore' file.These words will not appear in the output.(They will be counted, for purposes of the.B \-dcount.).TP.B \-oTake the next .I fileas an `only' file.Only these words will appear in the output.(All other words will also be counted forthe .B \-dcount.).TP.B \-pInclude punctuation marks (single nonalphanumeric characters)as separate output lines.The punctuation marks are not counted for the.B \-dcount..PPIgnore and only files contain words, one per line..SH SEE ALSOderoff(1)