lexer grammar t038lexerRuleLabel; options { language = Python; } A: 'a'..'z' WS '0'..'9' { print $WS print $WS.type print $WS.line print $WS.pos print $WS.channel print $WS.index print $WS.text } ; fragment WS : ( ' ' | '\t' | ( '\n' | '\r\n' | '\r' ) )+ { $channel = HIDDEN } ;