Seeking advice on custom analyzer to catenate word with following letters

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1

I would like catenate two words if one of word is very short, say just 1 letter.

For example, "direct x" to "directx"

I checked word delimiter token filter, but cannot resolve this case.

Any good approaches?

2

I suspect you would have to either build synonyms for the special cases that you encounter like this one, or build your own token filter (note: it is not easy).

3

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