charset
digits 0123456789
lowerCase abcdefghijklmnopqrstuvwxyz
upperCase ABCDEFGHIJKLMNOPQRSTUVWXYZ
remember space tab lf
dots . dot : colon , comma ; semicolon
dot2 | exclam ? question @ at # crossHat
"" quote '' apo `` backApo _ underscore
ops = equal - minus + plus * star
brackets () round [] square {} curly <> lt gt
bar / slash \ backslash ! bar ! brokenBar
$ dollar £ pound % percent & ampersand
~ tilde ^ hat
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