擅长:python、mysql、java
<p><code>\b(?:\w(\w)\1+|(\w)\2+\w|(\w)\3+)\b</code></p>
<p><a href="https://regex101.com/r/iDVkRT/1" rel="nofollow noreferrer">https://regex101.com/r/iDVkRT/1</a></p>
<pre><code> \b
(?:
\w
( \w ) # (1)
\1+
| ( \w ) # (2)
\2+ \w
| ( \w ) # (3)
\3+
)
\b
</code></pre>