\w*any word character, repeated any number of times
@the literal @ (6410 / 1008 / 4016)
\w+any word character, repeated at least once
.the literal . (4610 / 568 / 2E16)
\w{0,4}any word character, repeated between 0 and 4 times
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