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Author/Opus: This is the 142nd puzzle from our contributing puzzlemaster Murat Can Tonta.
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from left to right for the marked rows, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:00, Master = 2:45, Expert = 5:30.