Alpha Beta Gamma Delta...

I'm curious: how thebloody fuck did we get to omicron already? What about alpha, beta, gamma, delta, epsilon, zeta, eta, theta, iota, kappa, lambda, and all the others before omicron? I never heard anything about any of those strains.

Not a covidiot, I'm just concerned that whoever's naming these covid strains knows frickall about the Greek alphabet.