public class str_test
{
	public static void Main()
	{
		String a="hello world";
		Console.WriteLine(a);
		Console.WriteLine(a.Substring(1));
		Console.WriteLine(a.IndexOf("1"));
		if(a.IndexOf("1")==-1)
		{
			Console.Write("NOT FOUND");
		}
		else
		{
			Console.WriteLine("FOUND");
		}
		Console.Write(a.IndexOf('1'));
	}
}