There is such a thing as a mailman.
A mailman has an address which is a phrase.
A mailman can connect.
A mailman can read a phrase.
A mailman can read a number.
A mailman can readOne a phrase.
A mailman can readOne a number.
A mailman can write a phrase.
A mailman can write a number.
A mailman can finish.
A mailman can say it's done.
A mailman can say it's failed.