Strange Digits

Time Limit: 1 sec

**The Problem**

There is a strange kind of problem you have to solve. Suppose you have a two digit number **M. **At first you have to find out the reverse value of M (**Exp** if M=40 the reverse of M is=04).Then you have to find out the maximum between M and its reverse. And subtract minimum from the maximum. And now add the digits of the result value. (**Exp** if subtracted result value is 26 the summation of its digits will be 2+6=8). That's it.

**The Input**

The input will be a two digit number (**Not a palindrome**) (0<**M<**100**) **in each line**.**

**The Output**

For each line of input print the summation of digits in a separate line by doing above stated operations.

**Sample Input**

40

**Sample Output**

9

[**Note:** **A palindrome** is a number **from** which we get the same number if we reverse it. Suppose **88** if we reverse it we get **88** again that means same. This kinds of numbers are **palindrome**.]

Problem Setter: Parag Paul