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grammar t057autoAST43;
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options {language=JavaScript;output=AST;}
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a : A b=B b=B c+=C c+=C D {s = $D.text} ;
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A : 'a' ;
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B : 'b' ;
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C : 'c' ;
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D : 'd' ;
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WS : (' '|'\n') {$channel=HIDDEN;} ;
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