then C to D. Back and forth.
Try to find that single, tiny difference.
Once you think you have it, don’t just click away!
Re-examine it. Are you absolutely sure?
Is it possible that you just found a small printing error, or is it truly the intention?
Is there a pattern that would make a different sense?
Think about how a puzzle-maker might hide things in plain sight.
Try to step outside your usual way of looking at images.
We are not going to give you the answer. That would