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Author/Opus: This is the 116th puzzle from our contributing puzzlemaster Grant Fikes.
Rules: Standard Cross the Streams rules.
Answer String: Enter the length in cells of each of the black segments from top to bottom for the marked columns in the two grids, going in order from A to B to C to D and separating each entry with a comma.
Time Standards (highlight to view): Grandmaster = 2:15, Master = 3:15, Expert = 6:30.