import java.util.*;
import java.util.zip.*;
import java.util.List;
import java.util.regex.*;
import java.util.concurrent.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.locks.*;
import java.util.function.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.text.*;
import javax.swing.table.*;
import java.io.*;
import java.net.*;
import java.lang.reflect.*;
import java.lang.ref.*;
import java.lang.management.*;
import java.security.*;
import java.security.spec.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import java.awt.geom.*;
import javax.imageio.*;
import java.math.*;
class main {

abstract static class GAbstractOperator<T> {
  GAbstractOperator() {}
   final public GAbstractOperator<T> setName(String name){ return name(name); }
public GAbstractOperator<T> name(String name) { this.name = name; return this; }  final public String getName(){ return name(); }
public String name() { return name; }  String name;
  
  GAbstractOperator(String name) {
  this.name = name;}
}}