PROGRAMMING:Output gplt
Given a length of not more than 10000, only composed of English letters string. Please reorder the characters and output them in the order of 'gpltgplt...', and ignore other characters. Of course, the number of four characters (case insensitive) is not necessarily the same. If a certain character has been output, the remaining characters will still be printed in the order of 'gplt' until all characters are output.
###Input format:
Input in a line to give a length of not more than 10000, only composed of English letters of non empty string.
###Output format:
Output the sorted string in one line according to the requirements of the title. Ensure that the output is not empty.
###Input example:
```in
pcTclnGloRgLrtLhgljkLhGFauPewSKgt
```
###Output example:
```out
GPLTGPLTGLTGLGLL
```
answer：If there is no answer, please comment
###Input format:
Input in a line to give a length of not more than 10000, only composed of English letters of non empty string.
###Output format:
Output the sorted string in one line according to the requirements of the title. Ensure that the output is not empty.
###Input example:
```in
pcTclnGloRgLrtLhgljkLhGFauPewSKgt
```
###Output example:
```out
GPLTGPLTGLTGLGLL
```
answer：If there is no answer, please comment