AT_abc472_a [ABC472A] A

You are given a string $ S $ consisting of uppercase English letters. Output the string obtained by replacing every character in $ S $ other than `A` with `.`.

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

Output the answer.

### Sample Explanation 1 Since the first character is the only occurrence of `A` in $ S $ , output the string obtained by changing the second through seventh characters of $ S $ to `.`. ### Sample Explanation 2 $ S $ may contain two or more occurrences of `A`. ### Sample Explanation 3 $ S $ may contain no occurrence of `A`. ### Constraints - $ S $ is a string of length between $ 1 $ and $ 100 $ (inclusive) consisting of uppercase English letters.