## UniversalGreeting
### Instructions
In a file named `UniversalGreeting.java` write a function `greeting` that takes a String language as a parameter and returns a greeting message based on the language as follows:
`FR` : `Bonjour comment allez-vous?`
`EN` : `Hello, How are you?`
`ES` : `Hola, cómo estás?`
and return an empty string in any other case.
### Expected Functions
```java
public class UniversalGreeting {
public static String greeting(String message) {
// your code here
}
}
```
### Usage
Here is a possible `ExerciseRunner.java` to test your function :
```java
public class ExerciseRunner {
public static void main(String[] args) {
System.out.println(UniversalGreeting.greeting('EN'));
}
}
```
and its output :
```shell
$ javac *.java -d build
$ java -cp build ExerciseRunner
Hello, How are you?
$
```
