import java.lang.Object;
import java.util.Vector;

class CaptureConversion {

    <X> void assign(Vector<X> v1, Vector<X> v2) {
		v1 = v2;
    }

    void main() {
		Vector<?> v1;
		v1 = new Vector<Object>();
		Vector<? extends Object> v2;
		v2 = new Vector<Object>();
		v1 = v2;
		assign(v1, v2);
    }
}