Facebook comment trick

Lately there are some new kind of trick to make a page or post viral on fb.
Maybe the first was the "type: h-o-g-w-a-r-t-s to see wich house you belong". (see the pictures)
Sometimes appears new one of this kind of post, today I see an about football players.
The big question is: how to make this kind of posts? :)
Google was not my friend… :(

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