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# this works #!/usr/bin/perl -w ... print ++$a ."\n"; print ++$a ."\n";
perl -e '$char = "a"; print $char++, $/ for 1..20' perl -e '$char = "a0"; print $char++, $/ for 1..20' perl -e '$char = "a0a"; print $char++, $/ for 1..20'