Pronašao si se u čudnom zatvoru u kojem potiho svira glazba. Čim si došao k svijesti, stražar (koji preko sebe ima crnu plahtu da se ne prepozna tko je) ti se odmah obratio i rekao ti: "Ako otkriješ tko sam, pustit ću te na slobodu." Pod utjecajem adrenalina brzo si počeo gledat po zidovima i pronašao čak četiri različita crteža. U nadi da će ti pomoći u dešifriranju tko ti je stražar, pristupio si prvom crtežu:

Koju riječ skriva ovaj crtež?
You find yourself in a strange prison where music is playing quietly. As soon as you regained consciousness, a guard (covered with a black sheet so that his identity is hidden) immediately spoke to you and said: "If you figure out who I am, I will let you go free."
Under the influence of adrenaline, you quickly started looking at the walls and found four different drawings. Hoping they would help you decipher who the guard is, you approached the first drawing:

What word does this drawing hide?
[lang=hr]
Pronašao si se u čudnom zatvoru u kojem potiho svira glazba. Čim si došao k svijesti, stražar (koji preko sebe ima crnu plahtu da se ne prepozna tko je) ti se odmah obratio i rekao ti: "Ako otkriješ tko sam, pustit ću te na slobodu." Pod utjecajem adrenalina brzo si počeo gledat po zidovima i pronašao čak četiri različita crteža. U nadi da će ti pomoći u dešifriranju tko ti je stražar, pristupio si prvom crtežu:
\begin{itemize}
\item BLUE: \newline $1 \geq y \geq 0$
\item RED: \newline $1 \geq x \geq 0 \cup 4 \geq x \geq 2 \cup 7 \geq x \geq 5 \cup 9 \geq x \geq 8$ \newline $11 \geq x \geq 9 \cup 14 \geq x \geq 12 \cup 17 \geq x \geq 15$ \newline
$19 \geq x \geq 18 \cup 22 \geq x \geq 20 \cup 25 \geq x \geq 23 \cup 27 \geq x \geq 26$
\item PURPLE : answer
\end{itemize}
Koju riječ skriva ovaj crtež?
[/lang]
[lang=en]
You find yourself in a strange prison where music is playing quietly. As soon as you regained consciousness, a guard (covered with a black sheet so that his identity is hidden) immediately spoke to you and said: "If you figure out who I am, I will let you go free."
Under the influence of adrenaline, you quickly started looking at the walls and found four different drawings. Hoping they would help you decipher who the guard is, you approached the first drawing:
\begin{itemize} \item BLUE: \newline $1 \geq y \geq 0$ \item RED: \newline $1 \geq x \geq 0 \cup 4 \geq x \geq 2 \cup 7 \geq x \geq 5 \cup 9 \geq x \geq 8$ \newline $11 \geq x \geq 9 \cup 14 \geq x \geq 12 \cup 17 \geq x \geq 15$ \newline $19 \geq x \geq 18 \cup 22 \geq x \geq 20 \cup 25 \geq x \geq 23 \cup 27 \geq x \geq 26$ \item PURPLE : answer \end{itemize}
What word does this drawing hide?
[/lang]