Eamples:-
Hex input: 4f60 same as 4F60, f3600 (NB there are a lot of matches for a short hex like 'E4').
Character input: 亻月 exact match, 亻.*月 match with possiblely something else inbetween.
(More complicated regular expressions like \t⿰...月$ are also possible)
Type hex or character here:

String returned "sample_text=4f72"

U+4f72 = 20338 and is 佲

You typed "4f72" which is 4 bites long
Below are the matches in ids_irg.txt.

U+4F72 佲 ⿰亻名
U-00024F72 𤽲 ⿰白男
Below are the matches in ExtensionC_decomposed.txt.

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