using System;

interface Device1
{
	void start();
}

interface Device2
{
	void start();
}

public class ConcreteDevice : Device1, Device2
{
	void Device1.start()
	{
		Console.WriteLine("Device1 implementation");
	}
	
	void Device2.start()
	{
		Console.WriteLine("Device2 implementation");
	}

}

public class Test
{
	public static void Main()
	{
		Device1 d1 = new ConcreteDevice();
		Device2 d2 = new ConcreteDevice();
		
		d1.start();
		d2.start();
	}
}