After many hours I failed to complete Level 4. How frustrating! But what a great experience. I think Stripe did a great job at building a programming challen

After many hours I failed to complete Level 4. How frustrating! But what a great experience. I think Stripe did a great job at building a programming challenge. By going through the challenge I learned something new in each of the following: Python, Ruby, Scala, Go, Node/Javascript, Git, Hashes, DDOS, Consensus Algorithms, raft, transactional logs, Inverted Indexes, BitCoin, IRC Chat, and more. Thanks Stripe you made me a better programmer.