How to remove conditional words in notepad++?

Question

Notepad++

I've scoured the internet and can't find exactly what I need. I need to put this data in the mail:password format. That is, remove the first comma, after it the word, and so on. I will be glad to help)

Answer 1

Find: ^(?:([^,\n]*),){3}([^\n]+)
Replace with:$1:$2