using System;
 
public class Test
{
	public static void Main()
	{
		var str = "Hello : World";
		var parts = str.Split(':');
		var result = "";
		if (parts.Length > 1)
    		result = parts[1];
		else
    		result = parts[0];
 
    	Console.WriteLine(result);
	}
}
				dXNpbmcgU3lzdGVtOwoKcHVibGljIGNsYXNzIFRlc3QKewoJcHVibGljIHN0YXRpYyB2b2lkIE1haW4oKQoJewoJCXZhciBzdHIgPSAiSGVsbG8gOiBXb3JsZCI7CgkJdmFyIHBhcnRzID0gc3RyLlNwbGl0KCc6Jyk7CgkJdmFyIHJlc3VsdCA9ICIiOwoJCWlmIChwYXJ0cy5MZW5ndGggPiAxKQogICAgCQlyZXN1bHQgPSBwYXJ0c1sxXTsKCQllbHNlCiAgICAJCXJlc3VsdCA9IHBhcnRzWzBdOwogICAgCiAgICAJQ29uc29sZS5Xcml0ZUxpbmUocmVzdWx0KTsKCX0KfQ==