public class Iterative {

	public static BitList complement( BitList in ) {

		throw new UnsupportedOperationException( "not implemented yet!" );
		// Your code here
	}

	public static BitList or( BitList a, BitList b ) {

		throw new UnsupportedOperationException( "not implemented yet!" );
		// Your code here
	}

	public static BitList and( BitList a, BitList b ) {

		throw new UnsupportedOperationException( "not implemented yet!" );
		// Your code here
	}

	public static BitList xor( BitList a, BitList b ) {

		throw new UnsupportedOperationException( "not implemented yet!" );
		// Your code here
	}
}