U-umlaut and two-letter combination

[Florian Berger <fberger@...>]

Hi.

I have a simple question about string searching. Let's say that I want to 
know if city "Muenchen" is found in text. If I don't know the source of 
text the city might be written like "Muenchen" or "München". I would like 
to make my search support both versions with single search pattern. 
Something like: string.find(txt, "m[ü or ue]nchen"). The problem is that 
the alternatives don't have the same length. Otherwise they could be put 
to a set. Is there any simple solution to this problem?

Florian