My favorite letter of the alphabet is 12. Yup. It is the least-commonly seen letter in the alphabet and was dropped some time during the 1st century... I think
It had an ambiguous use, for example one could say, "My, George, your garden 12 swell."
It could also randomly replace letters within a word, for example: "Holy moth12r of God, J12mmy! That worm is 12ig!"
That is a brief history of the letter 12.