import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    }
} import java.io.BufferedReader; BufferedReader java.io import java.io.IOException; IOException java.io import java.io.InputStreamReader; InputStreamReader java.io import java.util.Arrays; Arrays java.util import java.util.HashSet; HashSet java.util import java.util.Set; Set java.util public class Main {
    public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    }
} Main public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    } main {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    } BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); br new BufferedReader(new InputStreamReader(System.in)) String list[] = br.readLine().split(" "); list br.readLine().split(" ") br.readLine().split br.readLine() br.readLine br " " Set<String> listSet = new HashSet<String>(Arrays.asList(list)); listSet new HashSet<String>(Arrays.asList(list)) if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No"); listSet.size() == 2 listSet.size() listSet.size listSet 2 System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String args[] args public class Main {
    public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    }
} public class Main {
    public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    }
} Main
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Main {
    public static void main(String args[]) throws IOException {
	BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
	String list[] = br.readLine().split(" ");
	Set<String> listSet = new HashSet<String>(Arrays.asList(list));

	if (listSet.size() == 2)
	    System.out.println("Yes");
	else
	    System.out.println("No");
    }
}