Added basic test

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.StringReader;

import java.util.HashSet;

public class Main {

    public static void main(String[] args) {

	      FindSimilar myFindSimilar = new MyFindSimilar();

        // thanks ChatGPT for the idea of how to convert a string into a BufferedReader

        String testStr = """

            oast

            oath

            ogre

            onyx

            oss

            ---

            ores

            ---

            """;

        StringReader strReader = new StringReader(testStr);

	      // Read and process input

        BufferedReader reader =

            new BufferedReader(new InputStreamReader(System.in));

            new BufferedReader(strReader);

        try {

            // read in dictionary

            for (

                !line.equals(DELIMITER);

                line = reader.readLine())

            {

                System.out.println(myFindSimilar.closestWord(line));

                int result = myFindSimilar.closestWord(line);

                System.out.println("Response: "+result);

                if (result!=2)

                    throw new RuntimeException("Incorrect return value - expecting 2.");

            }

        } catch (IOException e) {

            System.out.println("Sorry ... something went wrong.");

            e.printStackTrace();

            System.exit(-1);

            throw new RuntimeException("Something went wrong: "+e);

        }