hellothe literal text hello (case insensitive) \[the literal [ (9110 / 1338 / 5B16)
\d+a digit, repeated at least once
\]+the literal ] (9310 / 1358 / 5D16) , repeated at least once
g modifier: global. Finds all matches instead of stopping after the first
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters