like a Q&A for BFAS
⠀⠀⠀⠀⠀⠀⠀⠀⣠⣴⣶⡋⠉⠙⠒⢤⡀⠀⠀⠀⠀⠀⢠⠖⠉⠉⠙⠢⡄⠀ ⠀⠀⠀⠀⠀⠀⢀⣼⣟⡒⠒⠀⠀⠀⠀⠀⠙⣆⠀⠀⠀⢠⠃⠀⠀⠀⠀⠀⠹⡄ ⠀⠀⠀⠀⠀⠀⣼⠷⠖⠀⠀⠀⠀⠀⠀⠀⠀⠘⡆⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⢷ ⠀⠀⠀⠀⠀⠀⣷⡒⠀⠀⢐⣒⣒⡒⠀⣐⣒⣒⣧⠀⠀⡇⠀⠀ ⠀⢸ ⠀⠀⠀⠀⠀⢰⣛⣟⣂⠀⠘⠤⠬⠃⠰⠑⠥⠊⣿⠀⢴⠃⠀ ok ⢸ ⠀⠀⠀⠀⠀⢸⣿⡿⠤⠀⠀⠀⠀⠀⢀⡆⠀⠀⣿⠀⠀⡇⠀⠀⠀⠀⠀⠀⠀⣸ ⠀⠀⠀⠀⠀⠈⠿⣯⡭⠀⠀⠀⠀⢀⣀⠀⠀⠀⡟⠀⠀⢸⠀⠀⠀⠀⠀⠀⢠⠏ ⠀⠀⠀⠀⠀⠀⠀⠈⢯⡥⠄⠀⠀⠀⠀⠀⠀⡼⠁⠀⠀⠀⠳⢄⣀⣀⣀⡴⠃⠀ ⠀⠀⠀⠀⠀⠀⠀⠀⠀⢱⡦⣄⣀⣀⣀⣠⠞⠁⠀⠀⠀⠀⠀⠀⠈⠉⠀⠀⠀⠀ ⠀⠀⠀⠀⠀⠀⠀⢀⣤⣾⠛⠃⠀⠀⠀⢹⠳⡶⣤⡤⣄⠀⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⠀⣠⢴⣿⣿⣿⡟⡷⢄⣀⣀⣀⡼⠳⡹⣿⣷⠞⣳⠀⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⠀⢰⡯⠭⠹⡟⠿⠧⠷⣄⣀⣟⠛⣦⠔⠋⠛⠛⠋⠙⡆⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⢸⣿⠭⠉⠀⢠⣤⠀⠀⠀⠘⡷⣵⢻⠀⠀⠀⠀⣼⠀⣇⠀⠀⠀⠀⠀⠀⠀ ⠀⠀⡇⣿⠍⠁⠀⢸⣗⠂⠀⠀⠀⣧⣿⣼⠀⠀⠀⠀⣯⠀⢸⠀⠀⠀⠀⠀⠀⠀
