Find a website with unknown letters/digits

[hakkerdehak]

I have an image (from a CTF challenge) and it contains a very small text, which I believe refers to a website (duh, it is ending with .com).

There are 6 letters I cannot read properly (after using edge-detection filters with GIMP).

I tried iterating over {a..z} {0..9} with bash, and use curl to retrieve the http status code, but this is all terribly slow.

I'm wondering if there is not a better way to find if a site exists, for instance using nmap or some other tool.

Are there any tools that can take a domain name pattern or read a list of domains from stdin?

[hakkerdehak]

I wrote the whole thing in Python already, which was simple enough to do.

Would still be interested if a simple nmap one-liner could do this (and faster than the slow bash loop).