You can change line PRIRITY to change priority of all routing prefix, higher priority with lower number.
Or you can set priority of certain prefix.
For prefix 11, callee2’s priority is higher than callee1’s(line priority will not be effective if you set a priority in routing prefix)
For prefix 22, callee2’s priority is lower than callee1’s
For prefix 0, callee2’s priority is lower than callee1’s