public class A {
	private synchronized static void g(){
		int x=1;
	}
	synchronized A f(){
		return null;
	}
	public void foo(){
		g(); synchronized(this)
		{
			g();
		}
		g(); synchronized(this)
		{
			synchronized(this)
			{
				synchronized(this)
				{
					g();
				}
			}
			g();
		}
		synchronized(this)
		{
			g();
		}
	}
}