2 Valid Patterns

The literal pattern is simply:

\okokok\

However, the description leaves a clue for using a non-capture group to help with this pattern.

The non-capture group pattern is:

\(?:ok){3}\

Testing against 6 "ok" values

When testing the string input okokokokokok against these 2 patterns, the same 2 matches are returned:

Matches Returned:

 - matches\[0\] okokok
 - matches\[1\] okokok

Regarding Issues with other Patterns

I noticed a few submissions that return true on matches, but they either produce the wrong number of matches or invalid match values.

Invalid Pattern Returns 4 Matches instead of 2:

\(ok){3}\

Matches Returned:

 - matches\[0\] okokok
 - matches\[1\] ok
 - matches\[2\] okokok
 - matches\[3\] ok

Invalid Pattern Returns wrong values:

\(ok){3,}\

Matches Returned:

 - matches\[0\] okokokokokok
 - matches\[1\] ok