Even though any letter can be used, is the most common choice.

And many of the people can use letters more easily than before.

The number has 11 characters using both numbers and letters.

This letter can then be used to help the employee find a new job at another company.

Also the letters are often used more than once so it is best not to cross them out.

All letters in the tray must be used, each only once.

After six letters, each additional letter used in a word is worth 40 base points.

A question may be divided into parts even though numbers or letters are not used.

"Nobody would let his father's letter be used like that."

However, the letter on its own cannot be used to prove your identity and you do not need it to start work.