^start of line
\w{4,}a Unicode word character, repeated at least 4 times
@+the literal @ (6410 / 1008 / 4016) , repeated at least once
\w{2,}a Unicode word character, repeated at least 2 times
.any Unicode character (except for line terminators)
comthe literal text com (case sensitive) .any Unicode character (except for line terminators)
cothe literal text co (case sensitive) .any Unicode character (except for line terminators)
ukthe literal text uk (case sensitive) $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