[type]
Lexer

[grammar]
lexer grammar L;
I : ('a' | 'ab') {<Text():writeln()>} ;
WS : (' '|'\n') -> skip ;
J : .;

[input]
ab

[output]
ab
[@0,0:1='ab',<1>,1:0]
[@1,2:1='<EOF>',<-1>,1:2]