from ZH:

"I worked out yesterday. Guys from Sverdlovsk asked to help, to deduct a PDF booklet for citizens. Everything is useful.
"Not a question, - I agreed, - send the version". Fortunately, the work is not dusty.
have sent. I deducted. Repair the prints. sent him back. "Well, they say, we are sending in the printing already".
And here I feel like something is shaking. "Well, I say, guys, let me see you again quickly".
I guessed. I have looked. And surely!

I thought it was only in books about classical printing.

In the title "Rules of Behavior in Places of Mass Stay of People", in the word "stay" - instead of the letter "r" suddenly formed the letter "o".

Fixed, wiped out a cold sweat.
The booklet barely played with new colors!"