mysql - Regexp for a string -

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I want a regular expression to match all the stars like 't' or 't-th', but only 'Th'

My current Rijaxpi is: 

  REGEXP = '[T-TH]'

But this is all the stars Matches 't', 't-th' and 'g' which 'c' is not desirable 

  REGEXP = '(T-Th | T [^ h])'

We either match T-THU literally, or match T is nothing but a h except that In all words: T , t-th , but not th .


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