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.*;


/* We want an algebraic data type:

  SeenOrNot =
      Seen(rect, furtherNotes)
    | NotSeen
*/

// We simulate that with records and an interface:

class main {

static interface SeenOrNot {}
static class Seen implements SeenOrNot , IFieldsToList {
  static String _fieldOrder = "rect furtherNotes";
  Object rect;
  Object furtherNotes;
  Seen() {}
  Seen(Object rect, Object furtherNotes) {
  this.furtherNotes = furtherNotes;
  this.rect = rect;}
  public String toString() { return "Seen(" + rect + ", " + furtherNotes + ")"; }

public boolean equals(Object o) {
if (!(o instanceof Seen)) return false;
    Seen x =  (Seen) o;
    return eq(rect, x.rect) && eq(furtherNotes, x.furtherNotes);
}

  public int hashCode() {
    int h = 2572955;
    h = boostHashCombine(h, _hashCode(rect));
    h = boostHashCombine(h, _hashCode(furtherNotes));
    return h;
  }
  public Object[] _fieldsToList() { return new Object[] {rect, furtherNotes}; }
}
static class NotSeen implements SeenOrNot , IFieldsToList {
  NotSeen() {}
  public String toString() { return "NotSeen(" + ")"; }

public boolean equals(Object o) {
return o instanceof NotSeen;
}

  public int hashCode() {
    int h = -501619762;
    return h;
  }
  public Object[] _fieldsToList() { return null; }
}
static boolean eq(Object a, Object b) {
  return a == b || (a == null ? b == null : b != null && a.equals(b));
}


static int boostHashCombine(int a, int b) {
  return a ^ (b + 0x9e3779b9 + (a << 6) + (a >> 2));
}
static int _hashCode(Object a) {
  return a == null ? 0 : a.hashCode();
}


static String str(Object o) {
  return o == null ? "null" : o.toString();
}

static String str(char[] c) {
  return new String(c);
}


static interface IFieldsToList {
  Object[] _fieldsToList();
}
}