private static void IssueCommand(Robot robot, string commandInput)
{
foreach (var command in commandInput)
{
switch (command)
{
case 'L':
robot.TurnLeft();
break;
case 'R':
robot.TurnRight();
break;
case 'M':
robot.Move();
break;
default:
throw new UnknownCommandException(command);
}
}
}