A solution to this problem was published by Rix in Phrack 57 in which he showed it was possible to turn any code into alphanumeric code.

Hash The hash is a string of alphanumeric characters (typically hexadecimal) in the .torrent file that the client uses to verify the data that is being transferred.

Reminder letters.

Letters actually work.

Letters of transmittal

Following the change in Code Letters in 1934, Centaur was allocated the Code Letters GMQP.

Fadil sent Dania letters.

Fadil sent Dania letters.

Fadil sent Dania letters.

Sami sent Layla letters.

I need those letters.

Limitations imposed by websites on password length (usually no more than 36) and the characters permitted (usually alphanumeric and underscore) requires less extensive forms of Leet when used in this application.

My mother hates writing letters.

His letters become less significant.

Sami hasn't received any letters.

Sami sent Layla love letters.

Sami sent Layla many letters.

Sami sent Layla many letters.

Source 29 Arabic Letters Blog

OK, this is a test where you either have to pick out the big letters, or pick out the little letters, and the autistic mind picks out the little letters more quickly.

Letters to Milena is a book collecting some of Franz Kafka's letters to Milena Jesenská from 1920 to 1923.

Moreover in those days the nobles of Judah sent many letters to Tobiah, and Tobiah's letters came to them.

Think of one of the letters.

Hannah Brencher Love letters to strangers

Compare the style of those letters.

Have any letters arrived for me?

Have any letters arrived for me?

I wrote three letters last night.

Please do not forget capital letters.

Letters of sympathy kept flooding in.

Sami sent Layla two hundred letters.

Don't forget to mail the letters.

Don't forget to mail the letters.

Sami was terrorized by anonymous letters.

Sami's wife discovered Layla's steamy letters.

Sami sent Layla really bizarre letters.

These letters are from Sami's parents.

Letters of credit were not excluded.

Moreover in those days the nobles of Judah sent many letters unto Tobiah, and the letters of Tobiah came unto them.

Why doesn't he send me letters anymore?

No one I know writes letters anymore.

He threw away all her love letters.

Sami wrote Layla a lot of letters.

Sami and Layla were communicating through letters.

Sami sent Layla a lot of letters.