How to use Regex (in Pandas) to find hyphenated words in strings, then select only hyphenated words with 2 characters?

This is the code I have so far to select the hyphenated words:

 df_hyph = df[df["Sentence"].str.contains(r'\b(?:-)')]

Now I want to select the words with 2 or more characters:

 df_2 = df_hyph[df_hyph["Sentence"].str.contains(r'a-z')]

This line isn't working, what am I doing wrong?

source https://stackoverflow.com/questions/71697993/how-to-use-regex-in-pandas-to-find-hyphenated-words-in-strings-then-select-on

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