The input device is part of the putor.... Without it the putor is a boat anchor.
As an example, the rear of a dux squirts out the result of the dux day. The bill and mouth of the dux take in valuable nutrients that could be used by living creatures of value.....If you remove the bill and mouth, nothing squirts out the rear....
If you sew up the rear the dux explodes, (which in itself is a pleasant thought),,,,,
Therefore you cannot have a Dux without a mouth and butt...just like you cannot have a putor without an input device (keyboard) and monitor (output device).
Furthermore, remove a bill from a dux or a keyboard from a putor and they are still parts of a putor,,,, So
I WIN.. next item,...(preferentially old or forgotten technology)