User Input 2 Ints - Output True If One Is In Range Otherwise False

How do I make it so that if both numbers are entered between 10 and 20 it will print false?

The assignment: Ask the user to enter 2 ints. Output "true" if one of them is in the range 10 - 20 inclusive, but not both. Otherwise output "false"

12 99 → true
21 20 → true
8 99 → false
15 17 → false

import java.util.Scanner;
 public class Practice {
 public static void main(String[] args) {
 //get user input
Scanner user_input = new Scanner(System.in);
System.out.print("Enter a number: " );

[Code] ....