My regular expression replace isn’t working properly for multiple characters

[gifthubbro]

https://i.imgur.com/uIl8mXA.png ive set it to find (I)|(a), which is to be replaced with (?1c)|(?2d) , I tested this by writing in “ha” but this gets replaced with “h|d” while I was expecting it to turn out as “hd” – what did I do wrong?

Thanks in advance

[Sofistanpp]

Hi @gifthubbro

The replacement expression should be (?1c)(?2d), that is, without the “|”.