\[the literal [ (9110 / 1338 / 5B16)
Athe literal A (6510 / 1018 / 4116) (case sensitive)
\d+a digit, repeated at least once
]the literal ] (9310 / 1358 / 5D16)
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