import java.util.HashSet;
import java.util.Scanner;
import java.util.StringTokenizer;

public class TextInput {
    private Scanner inputReader;

    public TextInput() {
        inputReader = new Scanner(System.in);
    }

    public HashSet<String> getUserInput() {
        System.out.print("> ");
        String line = inputReader.nextLine().trim().toLowerCase();
        HashSet<String> words = new HashSet<>();
        StringTokenizer tokenizer = new StringTokenizer(line);

        while(tokenizer.hasMoreTokens()) {
            words.add(tokenizer.nextToken());
        }
        return words;
    }
}