Exam 1. Cognate Words

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

public class _1_CognateWords {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scan = new Scanner(System.in);
        String inputLine = scan.nextLine().trim();

        String[] words = inputLine.split("[^A-Za-z]+");
        HashSet<String> cognateWords = new HashSet<>();
        int w1, w2;
        String foundWords;
        for (w1 = 0; w1 < words.length; w1++) {
            for (w2 = 0; w2 < words.length; w2++) {
                if (w2 != w1) {
                    for (String rightStr : words) {
                        boolean isFoundCognateWords = words[w1].concat(
                                words[w2]).equals(rightStr);
                        if (isFoundCognateWords) {
                            foundWords = String.format("%s|%s=%s", words[w1],
                                    words[w2], rightStr);
                            cognateWords.add(foundWords);
                        }
                    }
                }
            }
        }

        if (cognateWords.isEmpty()) {
            System.out.println("No");
        } else {
            for (String lineStr : cognateWords) {
                System.out.println(lineStr);
            }
        }
    }

}