A char list containing the alphabet can be obtained by doing the following:

iex> for n <- ?a..?z, do: n
'abcdefghijklmnopqrstuvwxyz'

If desired, we can pass each bitcode to a binary to represent each letter as a string:

iex> for n <- ?a..?z, do: << n :: utf8 >>
["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p",
"q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]

Additional reading: - Binaries, strings, and char lists