Put all characters of a text in ASCII order.

Input

A single line of text.

Output

All characters of the text in ASCII order.

Tip

This is relatively easy to do with list methods, which will be introduced in a future chapter, but for now try to do it with string manipulation methods alone.

Example

Input:

And now for something completely different.

Output:

     .Acddeeeeefffghiillmmnnnnooooprrstttwy