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 List instancesOfLL(Class c, Object... l) {
return instancesOf(c, ll(l));
}
static List instancesOf(Iterable i, Class c) {
return collectInstances(i, c);
}
static List instancesOf(Class c, Iterable i) {
return collectInstances(c, i);
}
static List ll(A... a) {
ArrayList l = new ArrayList(a.length);
if (a != null) for (A x : a) l.add(x);
return l;
}
static List collectInstances(Iterable i, Class c) {
List l = new ArrayList();
if (i == null) return l;
c = primitiveToBoxedTypeOpt(c);
for (Object o : i)
if (isInstance(c, o))
l.add(o);
return l;
}
static List collectInstances(Class c, Iterable i) {
return collectInstances(i, c);
}
static Class primitiveToBoxedTypeOpt(Class type) {
return or(primitiveToBoxedType(type), type);
}
static boolean isInstance(Class type, Object arg) {
return type.isInstance(arg);
}
static A or(A a, A b) {
return a != null ? a : b;
}
static Class primitiveToBoxedType(Class type) {
if (type == boolean.class) return Boolean.class;
if (type == int.class) return Integer.class;
if (type == long.class) return Long.class;
if (type == float.class) return Float.class;
if (type == short.class) return Short.class;
if (type == char.class) return Character.class;
if (type == byte.class) return Byte.class;
if (type == double.class) return Double.class;
return null;
}
}