#include <stdbool.h>
#include <string.h>
#include "helper.h"

/*Subtract the letters in curWord from those in lettersRemaining. 
  If the subtraction is successful, return true, and set
  result to the string of characters remaining after the subtraction.
  If the subtraction is unsuccessful, return false.
  Assume result is already allocated enough space.
*/

bool subtract (char *lettersRemaining, char *curWord, char *result) {
  //...
}