Java Static Quiz 1

What is the output of the following code?

  public class Test{
    static int x;
    StringBuilder sb = new StringBuilder();
    static StringBuilder sb2 = new StringBuilder();
    public Test() {
      m1();
      m2();
    }
    public void m1(){
        x += 5;
        sb.append(x);
    }
    public void m2(){
        x += 10;
        sb2.append(x);
    }
    public static void main(String[] args){
        Test t1 = new Test();
        Test t2 = new Test();
        Test t3 = new Test();
        String s = t2.sb + "-" + t2.sb2;
        System.out.println(s);
      }
  }