So, no way in heck would this work right? Well, I can’t do the substitution in my head so I worked it out on paper. K occurs 8 times in K4. It’s the highest frequency number by 2 (ooohhh) so if there was a shift it would be to align E (PT) with K (CT).
It’s basically a Caesar shift of 6, or is it:
It looka lika no to me.
I was kind of wondering if you could apply the shift and see if any plaintext popped out but besides fox and axe, I got nuthin.