class Contains {

  public boolean evaluate(String w1, String w2) {
    if (w1 == null || w2 == null) {
      throw new IllegalArgumentException("You can't pass null strings as input.");
    }
    boolean contains = false;
    for (int i = 0; i < w2.length() - 1; i++) {
      if (w2.charAt(i) == w1.charAt(0)) {
        for (int j = 0; j < w1.length(); j++) {
          if (w1.charAt(j) == w2.charAt(i + j) && j == w1.length() - 1) {
            contains = true;
            break;
          }
        }
      }
    }
    return contains;
  }

}