Sthe literal S (8310 / 1238 / 5316) (case sensitive)
Tthe literal T (8410 / 1248 / 5416) (case sensitive)
_the literal _ (9510 / 1378 / 5F16)
\d{1,6}a Unicode decimal digit, repeated between 1 and 6 times
_POD_the literal text _POD_ (case sensitive) \.the literal . (4610 / 568 / 2E16)
txtthe literal text txt (case sensitive) jpgthe literal text jpg (case sensitive) jpegthe literal text jpeg (case sensitive) 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