%{
#include <string.h>
int is_palindrome(char *str);
%}
 
%%
[a-zA-Z]+  {
              if (is_palindrome(yytext))
                  printf("\"%s\" is a palindrome.\n", yytext);
              else
                  printf("\"%s\" is NOT a palindrome.\n", yytext);
          }
.|\n       ;
%%
 
int is_palindrome(char *str) {
    int len = strlen(str);
    for (int i = 0; i < len / 2; i++) {
        if (str[i] != str[len - 1 - i])
            return 0;
    }
    return 1;
}
 
int main() {
    yylex();
    return 0;
}
 

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