LETTER [a-zA-Z]
DIGIT [0-9]
%%
begin {printf("Recognized KeyWORD:%s\n",yytext);}
if {printf("Recognized KeyWORD:%s\n",yytext);}
{LETTER}({LETTER}|{DIGIT})*{
printf("Recognized ID:%s\n",yytext);}
%%
main()
{
yylex();
}
TEVUVEVSIFthLXpBLVpdCkRJR0lUIFswLTldCiUlCmJlZ2luIHtwcmludGYoIlJlY29nbml6ZWQgS2V5V09SRDolc1xuIix5eXRleHQpO30KaWYgICAge3ByaW50ZigiUmVjb2duaXplZCBLZXlXT1JEOiVzXG4iLHl5dGV4dCk7fQp7TEVUVEVSfSh7TEVUVEVSfXx7RElHSVR9KSp7CiAgICAgICAgICAgcHJpbnRmKCJSZWNvZ25pemVkIElEOiVzXG4iLHl5dGV4dCk7fQolJQptYWluKCkKewp5eWxleCgpOwp9