AT_abc402_a [ABC402A] CBC

You are given a string $ S $ consisting of uppercase and lowercase English letters. Print the string obtained by concatenating only the uppercase letters of $ S $ in their original order.

The input is given from Standard Input in the following format: > $ S $

Print the string obtained by concatenating only the uppercase letters of $ S $ in their original order.

### Sample Explanation 1 The string obtained by concatenating only the uppercase letters of $ S $ in their original order is `ACBC`. Hence, print `ACBC`. ### Sample Explanation 3 Note that $ S $ may contain no uppercase letters. ### Constraints - $ S $ is a string of uppercase and lowercase English letters. - The length of $ S $ is between $ 1 $ and $ 100 $ , inclusive.