hthe literal h (10410 / 1508 / 6816) (case insensitive)
o{3}the literal o (11110 / 1578 / 6F16) (case insensitive), repeated exactly 3 times
lthe literal l (10810 / 1548 / 6C16) (case insensitive)
a{2,3}the literal a (9710 / 1418 / 6116) (case insensitive), repeated between 2 and 3 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
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters