ASCIINEMA brain-even ----> https://asciinema.org/a/8x0Q6spw36Z4WGZdOW1ZkAVgI
ASCIINEMA brain-calc ----> https://asciinema.org/a/P9lj3yBaN3ZRj7A89TOortWke
ASCIINEMA brain-gcd ----> https://asciinema.org/a/EbDgQrYTA9geedXHaSiWYB6QC
ASCIINEMA brain-progression ----> https://asciinema.org/a/UO3aRcSulBwXgNbzZICTJGJum
ASCIINEMA brain-prime ----> https://asciinema.org/a/ACx22quDE5JO44gV1H9fLDqSg