多选题 Given:
4. public class Hemlock {
5. static StringBuffer sb;
6. StringBuffer sb2;
7. public static void main(String[] args) {
8. sb = sb.append(new Hemlock().go(new StringBuffer("hey")));
9. System.out.println(sb);
10. }
11. {sb2 = new StringBuffer("hi "); }
12. StringBuffer go(StringBuffer s) {
13. System.out.print(s + " oh " + sb2);
14. return new StringBuffer("ey");
15. }
16. static {sb = new StringBuffer("yo "); }
17. }
What is the result?