I always really liked this one, now no longer in the original place after that site shut down: https://doubleyoudoubledoubleewe.www.dash.deeohhtee.dash-dash.en

I always really liked this one, now no longer in the original place after that site shut down: https://doubleyoudoubledoubleewe.www.dash.deeohhtee.dash-dash.enneeetee.net/tmp/quoth-the-server-404.webp https://doubleyoudoubledoubleewe.www.dash.deeohhtee.dash-das... There are longer versions of that variant of the poem, and versions with cleaner references, that can be easily found, but I think this is the original – it is certainly the first instance of it that I saw.