User blog comment:BlauesWasser/I've been doing googology for a long time, but I still feel like a beginner/@comment-35811215-20180822205612

I recommend this playlist:https://www.youtube.com/playlist?list=PLUZ0A4xAf7nkaYHtnqVDbHnrXzVAOxYYC Even though I do not know how to speak English fluently, I managed to understand, I highly recommend it.