-*the literal - (4510 / 558 / 2D16) , repeated any number of times
\d*a digit, repeated any number of times
.?optionally matches any character (except for line terminators)
\d+a digit, repeated at least once
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