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public interface Contents {
    int value();
}
public interface Destination {
    String readLabel();
}
public class Goods {
    private class Content implements Contents {
        private int i = 11;
        public int value() {
            return i;
          }
      }
    protected class GDestination implements Destination {
        private String label;
        private GDestination(String whereTo) {
            label = whereTo;
          }
        public String readLabel() {
            return label;
          }
      }
    public Destination dest(String s) {
        return new GDestination(s);
      }
    public Contents cont() {
        return new Content();
      }
}
class TestGoods {
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public static void main(String args[]) 

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import java.io.File;
import java.io.FileInputStream;
import java.nio.MappedByteBuffer;
import java.nio.channels.FileChannel;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
public class MD5Util
{
 private static char md5Chars[] =
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