brain-even asciinema: https://asciinema.org/a/GBqXtckVVWuI7fj9UZpKTB6Bn
brain-calc asciinema: https://asciinema.org/a/hHgTrchsTpxWJqCdN5cQL8hqA
brain-gcd asciinema: https://asciinema.org/a/NNVkHOnBmCejIrcyZa8GZd4J7
brain-progression asciinema: https://asciinema.org/a/NlYlsEAJuOEWjQwKkdVILiiIW
brain-prime asciinema: https://asciinema.org/a/9h0S7WIpnQVVM39n04KdnjVgV