Answer:
What has 4 fingers and a thumb but isn't alive?
To cross the water I'm the way. For water I'm above I touch it not and truth to say I neither swim nor move.
I make things short but I am pretty long myself
I am black and white. I have strings I have keys. I make sound without my lips. I make dough with no flour
I row quickly with four oars but never comes out from under my own roof.
If itβs information you seek, come and see me. If itβs pairs of letters you need, I have consecutively three. What am I?