Alpha, beta, gamma, delta, epsilon and zeta
Eta, theta, iota, kappa, lambda, mu and nu
Xi, omicron, pi, rho, sigma, and tau
Upsilon, phi, chi, psi, and omega

Alpha, beta, gamma, delta, epsilon, zeta, eta
Theta, iota, kappa, lambda, mu, nu, xi, omicron, pi
Rho, sigma, tau, upsilon
Phi, chi, psi, omega

Now I know my alpha beta gamma's
Next time, won't you sing with me?

Wait a minute... there are four more letters to go, that's 28 letters!
Wait a sec, the standard alphabet didn't have the 27th and 28th letters. What's up with that?
Never mind.

Alpha, beta, gamma, delta, epsilon
Digamma, zeta, eta, theta, iota
Kappa, lambda, mu, nu, xi, omicron
Pi, san, qoppa, rho, sigma, tau
Upsilon, phi, chi, psi, omega, sampi
These are the letters of the Greek alphabet

Now I know a little more of my alpha beta gamma's
Next time won't you sing with me?