,. _2{ ;@:(( <@,"1 0 G ({:"1@]#~(={."1))~{:)&.>)^:(a:~:{.)^:a: <0
Works in this case, but not with different length paths, consider
H=. (#~12~:{."1) G
then is misses paths that end with 12.
--
Met vriendelijke groet,
@@i = Arie Groeneveld
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