It was a master's lecture that combined various elements and melted them into their own unique language. I had understood this content in a more mathematical language, like Iterable Functor -> Fx Monad, but I appreciated it being explained in a more practical form. Furthermore, the author's explanation of list processing has a mathematical framework for understanding it using adjoint functors, and it was excellent that they emphasized the potential confusion between code (meaning) < - > data (no meaning). However, personally, I found it difficult to consider it multi-paradigm, as almost all explanations seemed to be based on the functional paradigm. I am challenged by the instructor's ability to skillfully combine practice and theory. Thank you. Completed the course! Liked it!