# [Brain-Flak], 15 bytes (non-competing)

    {({}<>)<>}<>

[Try it online!]

12 bytes of code, and `+3` bytes for the `-c` flag, which enables input and output in ASCII.

Explanation:

    #While the stack is not empty:
    {

     #Push the top of the stack onto the alternate stack
     ({}<>)

     #Toggle back to the main stack
     <>

    #endwhile
    }

    #Toggle to the alternate stack, implicitly display
    <>

[Brain-Flak]: https://github.com/DJMcMayhem/Brain-Flak
[Try it online!]: https://tio.run/nexus/brain-flak#@1@tUV1rY6dpYwck//8PyUhVKCzNTM5WSCrKL89TSMuvUMgqzS1ITVHIL0stUigByuckVlUqpOSnF@v9100GAA "Brain-Flak – TIO Nexus"