What Will Be The Output Of The Following Java Codep Pre #537

 public class Main { int a; Main(int a) { this.a = a; } Main(Main s) { a = 10; } void disp() { System.out.println(a); } public static void main(String[] args) { Main a = new Main(20); Main b = new Main(a); a.disp(); b.disp(); } }

10 10

20 20

20 10

10 20