While delivering potions to the army, Kaoru accidentally deciphers a coded message from a crime ring that the army had been pursuing. An army officer takes notice and asks Kaoru to decipher another message regarding a hidden treasure.
so you take every third letter 
and put them together. Then...
لذا تأخذ كلّ ثالث حرف
...وتجمعهما معاً. ثمّ
Así que se agrupan
todas las terceras letras.
Así que se agrupan
todas las terceras letras.
ce qui signifie qu’on saute
les lettres trois par trois…
então você pega cada terceira
letra e as junta. Depois...
Выписываете их и составляете вместе.