using System;
public class MainClass {
static void Main() {
Console.WriteLine("Enter command:");
string resp = (Console.ReadLine()).ToLower();
switch (resp) {
case "a":
Console.WriteLine("Doing Task A");
break;
case "b":
Console.WriteLine("Doing Task B");
break;
case "c":
Console.WriteLine("Doing Task C");
break;
default:
Console.WriteLine("Bad choice");
break;
}
}
}