I should have added that this solution stops working as soon as you're handling 5 out of 50 cases. Lexical tokens are which always trigger the mentioned problem

I should have added that this solution stops working as soon as you're handling 5 out of 50 cases. Lexical tokens are which always trigger the mentioned problems in my code - often you match against subsets, are there are _way_ too many of them to add them all explicitly.