using System;
public class Test
{
public static void Main()
{
var x = "a";
var y = "";
switch(x) {
case "a":
y = "a";
break;
case "b":
y = "b";
break;
}
Console.Write(y);
}
}
dXNpbmcgU3lzdGVtOwoKcHVibGljIGNsYXNzIFRlc3QKewoJcHVibGljIHN0YXRpYyB2b2lkIE1haW4oKQoJewoJCXZhciB4ID0gImEiOwoJCXZhciB5ID0gIiI7CgkJc3dpdGNoKHgpIHsKCQkJY2FzZSAiYSI6CgkJCQl5ID0gImEiOwoJCQkJYnJlYWs7CgkJCWNhc2UgImIiOgoJCQkJeSA9ICJiIjsKCQkJCWJyZWFrOwoJCX0KCQkKCQlDb25zb2xlLldyaXRlKHkpOwoJfQp9