my @Chars = ('0'..'9', 'A'..'Z', 'a'..'z');

##</code><code>##

$ perl -le 'my @one="0".."9","a".."z"; my @two=("0".."9","a".."z"); print @one; print @two'
0123456789
0123456789abcdefghijklmnopqrstuvwxyz