^start of line
Ithe literal I (7310 / 1118 / 4916) (case sensitive)
.*?any character (except for line terminators), repeated any number of times
the literal (3210 / 408 / 2016)
Non-Capturing Group(?:one|two) onethe literal text one (case sensitive) twothe literal text two (case sensitive) the literal (3210 / 408 / 2016)
.*any character (except for line terminators), repeated any number of times
$end of line
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