Answer:
The complete code is given below:
Explanation:
import java.util.Scanner;
public class Prime
{
public static String foo(String s)
{
if (s.length() ==0)
return "even";
else if (s.length() == 1)
return "odd";
else
return foo(s.substring(0, s.length() - 2));
}
public static void main(String[] args)
{
String s="Hello";
System.out.println(foo(s));
}
}