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 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 javax.imageio.*;
import java.math.*;
class main {

static <A> List<A> listMinusItem(A a, Collection<A> l) {
  return listMinus(l, a);
}
static <A> List<A> listMinus(Collection<A> l, Object... stuff) {
  if (l == null) return null;
  List l2 = similarEmptyList(l);
  Set set = lithashset(stuff);
  for (Object o : l)
    if (!set.contains(o))
      l2.add(o);
  return l2;
}



static List similarEmptyList(Collection m) {
  return new ArrayList();
}

static <A> HashSet<A> lithashset(A... items) {
  HashSet<A> set = new HashSet();
  for (A a : items) set.add(a);
  return set;
}


}