Negative Lookbehind(?<!\d) \d{2}a digit, repeated exactly 2 times
\D*any character that's not a digit, repeated any number of times
\d{8}a digit, repeated exactly 8 times
\D*any character that's not a digit, repeated any number of times
\da digit
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