[r-t] All the 4-runs

[Mark Davies]

Graham John wrote:

> Richard has now provided an exact 5000. It makes the impossible one-part of
> Stedman Triples look like a piece of cake!
> 
> https://complib.org/composition/91437

Wow! Mind you, this seems to have a CompLib score 2 down on the 5360. 
What's it missing, and can we live without it? :-D

MBD