What is the output of the following code segment?

public class C { public static void main(String[] args) {

String s1, s2, s3;

...

s1=new String("ABC");

s2=new String("ABC");

s3=s1;

if (s1==s2) System.out.print("W");

if (s1==s3) System.out.print("X");

if (s2==s3) System.out.print("Y");

if (s1.equals(s2)) System.out.print("W");

if (s1.equals(s3)) System.out.print("X");

if (s2.equals(s3)) System.out.print("Y");

}

}