How many induvidual keys are used as hotkey shortcuts? kind of a weird question, so here's some context.

I'm left handed, and use the mouse (and tablet stylus) with my left hand (like a heathen, I know), and it forces to to be hunched over in kind of a weird position, leaning to the left, using the left side of the keyboard with my right hand, which results in a lot of weird finger stretching 

I've been looking into getting a mini re programmable keyboard ( something like this ) to save my posture while blender-ing, sculpting (and using other programs), and avoid rebinding Blender's metric ton of shortcuts to something more ergonomically sensible. (I'd have no idea where to even start with that, lol.)

So, would anyone happen to know how many keys (out of the standard ~104) Blender actually uses, so that I know how few keys, and how small a keyboard I can reasonably get away with? (I realize I could try switching to a traditionally accepted righthanded mouse style, but switching my mouse hand at this point seems like more trouble than this sort of thing.)
I couldn't really give you a number, but I do know they have a documented list of all the shortcuts they use. It should be listed in your user preferences (because you can remap them), but you can also find a list if you search for the version you're using. 

Please Take Notice: Many of the shortcuts changed for 2.8. If you're planning on using that version at any point in the future, consider taking a look at those shortcut keys, instead.