Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
(not w and not z) or (not v and x and y) or (not v and w and y) or (not v and not z)
Natural Language
Math Input
Extended Keyboard
Examples
Upload
Random