How to mirror text 1234 by 4321, 1000 lines?

Question

linux

How to mirror text 1234 by 4321, 1000 lines?
The task is in LibreOffice, but I did not find a solution.
A fallback option through the terminal how to do this and throw it back into libreoffice.

Answer 1

rev command in linux

Answer 2

Ctrl+H
Find: 1234
Replace: 4321
Replace All

Answer 3

A ready-made solution has already been proposed by Alexander.
And the author, if he wants to solve it in the Libre office environment (by the way, to clarify what was meant, writer or calc) must study basic, which is built into this environment and use it.
In my humble opinion, solving such problems in offices is a whim that no one needs.
Professionals are never interested. And at the level of a kitchen recipe - the solution in 1 post is already ready.