Hi

I'm sorry, my fault: i misinterpreted the upper bound, I used start + limit, instead of simply limit, and I oversaw n < m.....
In german a sying is: "Man sieht den Wald vor luter Bäumen nicht"

The Haskell seems to be wrong, the require all "Nothing" but

buddy 200 1000 == Just (1050, 1925)

buddy 5000 7726 == Just (5775, 6128)

buddy 2382 5000 == Just (5775, 6128)

buddy 2177 2300 == Just (2295, 2024)

buddy 6419 6900 == Just (8892, 16587)

buddy 6379 6500 == Just (8892, 16587)

buddy 3402 3475 == Just (5775, 6128)

buddy 3684 4362 == Just (5775, 6128)

Is there anybody who ist able to fix this?