he letter at index n (where n is taken from the INTEGER stack) replaced with the top CHAR. If n is out of bounds, it is reduced modulo the length of the string</p>
<h2><a href="#string-split" id="string-split"></a>:string_split</h2>
<p>Splits the top STRING on whitespace, and pushes back the resulting components in the same order</p>
<h2><a href="#string-substr" id="string-substr"></a>:string_substr</h2>
<p>Pushes the substring of the top STRING, with beginning and end indices determined by the second topmo