%%

%standalone
%class Calc

nl        =  \n|\r|\r\n
string          =  [0-9,A-F][0-9,A-F]+
lang           =  [A-Z,a-z]+

%%

{string}    {System.out.println("contains Hexa-decimal number: " +yytext());}
{lang}            {System.out.println("invalid: " +yytext());}


{nl}|" "|\t     {;}

.        {System.out.println("invalid " + yytext());}



6756598
46645AB
CHJYF