text: #ifndef _UTILS_
  #define _UTILS_
  
  #include "prefixTree.h"
  #include "binaryTree.h"
  
  #define NOT_VALID -5
  #define VALID 1
  
  #define DFLT_STR "E"
  #define DFLT_CHAR 'E'
  
  void menu(Node *node);
  void showMenu();
  int checkPrefix(char *prefix);
  int scanOption();
  void *mallocVerified(int number, int size);
  
  #endif
  