The Missing Letter

Interview

Time limit1sMemory limit1024 MB

Summary

Given 25 distinct uppercase English letters, print the one letter of the alphabet that is missing.

Level: Easy1 of 10
Topics: String, Implementation
Solved: No attempts yet

Problem

Bajtosia teaches English at a kindergarten. Today the children are learning the letters of the English alphabet. For this lesson, Bajtosia prepared 26 special letter cards, each showing one letter of the alphabet.

At the last moment, Bajtosia noticed that she has only 25 cards. One of them must have gone missing somewhere! Can you determine which card is missing?

Input

The first and only line of input contains 25 uppercase letters of the English alphabet. These are the letters on the cards Bajtosia has. All letters are distinct.

Output

Print the missing letter on a single line.

Examples3

Example 1
Input
```
QWERTYUIPASDFGHJKLZXCVBNM
```
Expected output
```
O
```
Example 2
Input
```
QAZWSXEDCRFVTGBYHNUJMKOLP
```
Expected output
```
I
```
Example 3
Input
```
ABCDEFGHIKLMNOPQRSTUVWXYZ
```
Expected output
```
J
```