Amaryllis, Ginro and Kohaku are chosen to join the inner palace. The science team will need a way to communicate with them in secret, and, eventually, a way for them with the science team.
But how do we discreetly inform Senku 
and the others in the science team?
لكن كيف نعلم سينكو والبقية من فريق العلم سرًّا؟
So weit, so gut.
Encontré la clave,
He encontrado la clave,
J’ai découvert son emplacement,
Ho trovato la chiave della scienza.
Mas como informamos discretamente o 
Senku e os outros no time da ciência?
Ключ найден.