Test your IQ with this situation:
There is a mute who wants to buy a toothbrush.
By imitating the action of brushing one's teeth he successfully expresses himself to the shopkeeper and the purchase is done.
Now if there is a blind man who wishes to buy a pair of sunglasses, how should he express himself?
Think and then scroll down for the answer.
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He just has to open his mouth and ask, so simple.
If you got this wrong, please -- don't pass go, do not breed, just go dig a hole and hide!!!