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TR(1)											    TR(1)

       tr - translate characters

       tr [ -cds ] [ string1 [ string2 ] ]

       Tr  copies  the	standard  input  to  the standard output with substitution or deletion of
       selected characters (runes).  Input characters found in string1 are mapped into the corre-
       sponding  characters  of  string2.   When  string2  is short it is padded to the length of
       string1 by duplicating its last character.  Any combination of the  options  -cds  may  be

       -c     Complement  string1:  replace it with a lexicographically ordered list of all other

       -d     Delete from input all characters in string1.

       -s     Squeeze repeated output characters that occur in string2 to single characters.

       In either string a noninitial sequence -x, where x is  any  character  (possibly  quoted),
       stands for a range of characters: a possibly empty sequence of codes running from the suc-
       cessor of the previous code up through the code for x.  The character followed by 1, 2  or
       3  octal digits stands for the character whose 16-bit value is given by those digits.  The
       character sequence followed by 1, 2, 3, or 4 hexadecimal digits stands for  the	character
       whose 16-bit value is given by those digits.  A followed by any other character stands for
       that character.

       Replace all upper-case ASCII letters by lower-case.

	      tr A-Z a-z <mixed >lower

       Create a list of all the words in one per line in where a word is taken to  be  a  maximal
       string of alphabetics.  String2 is given as a quoted newline.

	      tr -cs A-Za-z '
	      ' <file1 >file2



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