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\section{Enclosures}  There are four types of enclosures: \texttt{(parentheses)}, \texttt{[brackets]}, \texttt{\{braces\}}, (parentheses), [brackets], {braces},  and \texttt{\"quotation marks\"}. "quotation marks".  Each one that you open will need to be closed at some point. This is called ``balancing,'' that is, keeping properly matched pairs of enclosures throughout your code.