Two string - Java - InputStream, OutputStream, System.in, System.out

Twostring4.java

import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.BufferedReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.IOException;
import java.util.StringTokenizer;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Solution {
	public static void main(String[] args) {
		InputStream inputStream = System.in;
		OutputStream outputStream = System.out;
		InputReader in = new InputReader(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		TwoStrings solver = new TwoStrings();
		solver.solve(1, in, out);
		out.close();
	}
}

class TwoStrings {
    public void solve(int testNumber, InputReader in, PrintWriter out) {
        int t = in.nextInt();
        for (int i = 0;i < t;i++) {
            out.println(is(in.next(), in.next()) ? "YES" : "NO");
        }
    }

    private boolean is(String a, String b) {
        boolean w1[] = new boolean[26];
        boolean w2[] = new boolean[26];

        for (char c : a.toCharArray()) w1[c - 'a'] = true;
        for (char c : b.toCharArray()) w2[c - 'a'] = true;

        for (int i = 0;i < 26;i++) {
            if (w1[i] && w2[i]) return true;
        }
        return false;
    }

}

class InputReader {
	private BufferedReader br;
	private StringTokenizer st;
	public InputReader(InputStream in) {
		br=new BufferedReader(new InputStreamReader(in));
		try {
			st=new StringTokenizer(br.readLine());
		} catch (IOException ignored) {

		}
	}

	public boolean readLine() {
		try {
			st=new StringTokenizer(br.readLine());
		} catch (IOException e) {
			return false;
		}
		return true;
	}
	public int nextInt(){
		if(!st.hasMoreTokens()) readLine();
		return Integer.parseInt(st.nextToken());
	}

	public String next(){
		if(!st.hasMoreTokens()) readLine();
		return st.nextToken();
	}

}