Nuts. On challenge #1 my code passed 14/15 of their test cases, and failed on the final one. Only, I don't get sufficient feedback to determine where the bug is

Nuts. On challenge #1 my code passed 14/15 of their test cases, and failed on the final one. Only, I don't get sufficient feedback to determine where the bug is. Ok - I only spent 15 minutes on this, and I'm not particularly interested in finding a job with any of the companies that are listed. Still annoying though.