Theme: Easy as 123
Author/Opus: This is the 307th 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 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 = 3:30, Master = 5:00, Expert = 10:00.