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 {

static Class boxedToPrimitiveTypeOpt(Class type) {
  return or(boxedToPrimitiveType(type), type);
}
static <A> A or(A a, A b) {
  return a != null ? a : b;
}


static Class boxedToPrimitiveType(Class type) {
  if (type == Boolean.class) return boolean.class;
  if (type == Integer.class) return int.class;
  if (type == Long.class) return long.class;
  if (type == Float.class) return float.class;
  if (type == Short.class) return short.class;
  if (type == Character.class) return char.class;
  if (type == Byte.class) return byte.class;
  if (type == Double.class) return double.class;
  return null;
}



}