^start of line
Headthe literal text Head (case sensitive) \(the literal ( (4010 / 508 / 2816)
\d+a Unicode decimal digit, repeated at least once
\)the literal ) (4110 / 518 / 2916)
Sitethe literal text Site (case sensitive) \(the literal ( (4010 / 508 / 2816)
\d+a Unicode decimal digit, repeated at least once
\)the literal ) (4110 / 518 / 2916)
.*any Unicode character (except for line terminators), repeated any number of times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string