[aleph_minus_one]

> If you don't know Greek letters, you'd have a hard time guessing р made a 'r' sound.

If you grew up in Christian family, you know the Greek letters Χ (chi), Ρ (rho):

> https://en.wikipedia.org/wiki/Chi_Rho

P.S. I am aware that "Windows XP" jokes that arise from this Chi Rho symbol are very easy to write ...