I have a text with several paragraphs.
For each of them I trying to find the following combinations, and put before them a particular character:

[space][one italic character]
should become:
§[found text]

[one italic character][space][one non italic character]
should become:
@[found text]

for example "Aaaaa bbbb cccc" should become "Aaaa§ bbbb@ cccc"

Any idea? thanks in advance