public class Father
{
	int a =1;

	class Son
	{
		int a = 2;

		class Grandson
		{
			int a = 3;
			void out()
			{
				System.out.println ("a = " + a);
				System.out.println ("a = " + Son.this.a);
				System.out.println ("a = " + Father.this.a);
			}
		}
	}
}