This program can create a list of domain names with the given letters and check them.
Armin and I wanted to write a program a while ago to get a list of domains we can use for ssh with the letters we want.
Now I have written this program in the form of functional programming.
Put the letters you want to create a domain with after the program execution command
$ python3 code.py abcd
this program support pipe commands in unix
$ echo "abcd" | python3 code.py