I would expand Carolyn's Cabbalistic Equation:
C = K = S = Z (Z for Zembla) - since in Russian usage following German or Dutch prononciation of S, many Germanic words that start with S are transiterated with 3 (=Z) in Cyrillic, for example Brechtian term "Song" became known as a "zong". And we recall that Zembla is Semberland.
Adding Cyrillic 3, we get also Pythagorean triad, the number of main characters in PF.
C = K = S = 3 = Z
And then C = K = S = 3 = Z = C since Germanic Z is pronounced "ts", so one goes a full zirkle.
I have to run to class otherwise "I could talk like this forever" (HMS Pinafore)...
Victor Fet