[Python] How can I select a string with the following pattern using RegEx with Python?

I'm looking for specific structures in my text data. One of these is creating many problems; look the following toy sentence:

"As you can see by reading point a) and b), someone could even use lect. A), B) and Z)."

My goal is to use a RegEx which can find structures representing items list, where the items are represented with the use of ALPHA+PARENTHESES.

Even if it might not be the best solution, I thought that one way could be defining the following pattern:

WORD + ALPHA) + xx + ALPHA) where "xx" represent all the sequence of characters (including symbols and spaces) between ALPHA) and ALPHA) which does not contain more than 3 alpha characters in sequence. How can I do it using RegEx? Anyone with some ideas to deal with such a problem?

In the shown example I would like to get:

• "point a) and b)"
• "lect. A), B) and Z)"

I have to say I'm not so skilled in using RegEx.

I hope I made the problem clear. Thanks in advance to anyone who can help!

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