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It'd be good to indicate which kolakoski sequence you mean since I can find at least two different ones
1. wikipedia = http://oeis.org/A000002
2. wolfram mathworld = http://oeis.org/A006928
it is https://oeis.org/A000002
Test suite has been updated -
> str2num has been outlawed to prevent hard-coded and cheat/hack solutions.
> Test cases added, including a random number check.
> Solutions have been re-scored.