The Greeks used a ciphered system based on their alphabet to represent numbers, at least from about 450 B.C.E. The representation was as follows:
$$
\begin{array}{llllll}
\alpha & 1 & \iota & 10 & \rho & 100 \\
\beta & 2 & \kappa & 20 & \sigma & 200 \\
\gamma & 3 & \lambda & 30 & \tau & 300 \\
\delta & 4 & \mu & 40 & v & 400 \\
\epsilon & 5 & \nu & 50 & \phi & 500 \\
\zeta & 6 & \xi & 60 & \chi & 600 \\
\zeta & 7 & o & 70 & \psi & 700 \\
\eta & 8 & \pi & 80 & \omega & 800 \\
\theta & 9 & i & 90 & \lambda & 900
\end{array}
$$
where the letters $\zeta$ (digamma) for 6,9 (koppa) for 90 , and $D \lambda$ (sampi) for 900 are letters that by this time were no longer in use. Hence 754 was written $\psi v \delta$ and 293 was written $\sigma \varphi \gamma$. To represent thousands, a mark was made to the left of the letters $\alpha$ through $\theta$; for example, $\theta$ represented 9000 . Larger numbers still were written using the letter $M$ to represent myriads $(10,000)$ with the number of myriads written above: $M^\delta=40,000, M^{\text {thou }}=71,750,000$. Represent 125 , 62, 4821. and 23,855 in Greek alphabetic notation.