Regex string contains at least one character
<p>I have a special code which is always 7 characters. The first 3 character must always contain a letter [A-Za-z]. </p>

<p>Ex: <code>12**A**5667</code> or <code>**A**2156903</code> OR <code>2**A**14312</code></p>

<p>I know I can do it with <code>^\d{2}[A-Za-z]\d{4}|[A-Za-z]\d{2}\d{4}|\d[A-Za-z]\d{5}$</code>
but is there a way that I can simplify this code with look-ahead function or something?</p>