how to teach a cat to type

[bleech]

how hard would it be to teach a cat to type? i dont mean just randomly walking on a keyboard, but actually to portray thoughts using a keyboard. im thinking that since cats are not able to produce the sounds necessary for most modern human languages, that this would be the easiest way to figure out what is on their minds.

obviously it would be best achieved with a cat that has its natural predatory instinct bred out of its lineage. also one must take into consideration that the letters on the keyboard are symbolic of written letters, so a knowledge of the alphabet would be required.

i am asking seriously if this is impossible, or maybe no one has thought of doing something like this?