Say you want to match a string that begins with 38 or 39 and has a total length of either 14 or 16. Below is my best attempt at making this expression. It works if I remove the 14 for strings with 14 characters, or the 12 for strings with 16 characters.Say you want to match a string that begins with
阅读背景：
在RegEx中设置多个可能的长度
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