Comment by fanf2

and sed https://pubs.opengroup.org/onlinepubs/9699919799/utilities/s...

and m4 https://pubs.opengroup.org/onlinepubs/9699919799/utilities/m...

and ex https://pubs.opengroup.org/onlinepubs/9699919799/utilities/e...

and bc https://pubs.opengroup.org/onlinepubs/9699919799/utilities/b...

unix isn’t short of programming languages!