class RemoveAlphabetsHandler implements Handler<String, String> {

  private static final Logger LOGGER = LoggerFactory.getLogger(RemoveAlphabetsHandler.class);

  @Override
  public String process(String input) {<FILL_FUNCTION_BODY>}
}

    var inputWithoutAlphabets = new StringBuilder();
    var isAlphabetic = (IntPredicate) Character::isAlphabetic;
    input.chars()
        .filter(isAlphabetic.negate())
        .mapToObj(x -> (char) x)
        .forEachOrdered(inputWithoutAlphabets::append);

    var inputWithoutAlphabetsStr = inputWithoutAlphabets.toString();
    LOGGER.info(
        String.format(
            "Current handler: %s, input is %s of type %s, output is %s, of type %s",
            RemoveAlphabetsHandler.class, input,
            String.class, inputWithoutAlphabetsStr, String.class
        )
    );

    return inputWithoutAlphabetsStr;
  
<no_super_class>