\w+any word character, repeated at least once
?optionally matches the literal (3210 / 408 / 2016)
\+the literal + (4310 / 538 / 2B16)
?optionally matches the literal (3210 / 408 / 2016)
\w+any word character, repeated at least once
g modifier: global. Finds all matches instead of stopping after the first