public int noTeenSum(int a, int b, int c) {
  return fixTeen(a) + fixTeen(b) + fixTeen(c);
}

public int fixTeen(int n) {
  if(n >= 13 && n <=19){
    if(n == 15 || n == 16){
      return n;
    }
    return 0;
  }

  return n;
}