Viewing insights from 2012 AMC 10B Problem 19 that are similar (thus shared) with only this insight from USACO 2023 US Open Contest, Bronze: FEB: Somehow need to know to brute force some smaller examples when testing out the groupings. For example, if we group based on X FFF...FFF X where X is either E or B, have to know to try and test out all possible scenarios for this case to then see the pattern. by fluffy_mango