U+202E and U+202C are control characters that change the direction of the text (see also https://www.explainxkcd.com/wiki/index.php/1137:_RTL)

In order to be able to type them, you can use HTML entities: https://www.w3schools.com/charsets/ref_utf_symbols.asp

You can write any Unicode character like that, for example a becomes a.