package java.lang;
import java.util.Iterator;
public interface Iterable<T> {
  Iterator<T> iterator();
}

package java.util;
public interface Iterator<E> {
  boolean hasNext();
  E next();
  void remove();
}

package java.util;
public interface Collection<E> extends Iterable<E> {
  int size();
  boolean isEmpty();
  boolean contains(Object o);
  Iterator<E> iterator();
  Object[] toArray();
  <T> T[] toArray(T[] a);
  boolean add(E e);
  boolean remove(Object o);
  boolean containsAll(Collection<?> c);
  boolean addAll(Collection<? extends E> c);
  boolean removeAll(Collection<?> c);
  boolean retainAll(Collection<?> c);
  void clear();
  boolean equals(Object o);
  int hashCode();
}

package java.util;
public interface Map<K,V> {  
  int size();
  boolean isEmpty();
  boolean containsKey(Object key);
  boolean containsValue(Object value); 
  V get(Object key); 
  V put(K key, V value); 
  V remove(Object key);
  void putAll(Map<? extends K, ? extends V> m);
  void clear();
  Set<K> keySet();
  Collection<V> values();
  Set<Map.Entry<K, V>> entrySet();
  interface Entry<K,V> {
    K getKey();
    V getValue();
    V setValue(V value);
    boolean equals(Object o);
    int hashCode();
  }
  boolean equals(Object o);
  int hashCode();
}