/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
ArrayList<String> sam;
sam = new ArrayList<String>();
sam.add( "ben" );
sam.add( 0, "wil" );
sam.set( 1, "cat" );
sam.add( 1, "dog" );
sam.add( "pig" );
sam.remove(2);
sam.set(1, "up");
System.out.println( sam.contains("sam") );
	}
}

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