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        pinner p = new pinner();
        p.index = 20;
        p.Print();
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        pouter po = new pouter();
        pinner pi = po.new pinner();
        pi.index = 40;
        pi.Print();
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            System.out.println("Print in inner Outer.index=" + pouter.this.index);
            System.out.println("Print in inner Inner.index=" + this.index);
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