With Day 1 of the "thinking" test over, Ayanokoji is talking to Hirata and the others about a way to break out of the stalemate when he receives a message on his phone from an irritated Horikita. Meanwhile, noticing something strange about Karuizawa's behavior, he seeks information from Horikita, but...
You don't even use each other's first names.
ولا تناديان بعضيكما مباشرةً
بأسمائكما الأولى أيضاً
Ihr nennt euch auch
immer noch beim Familiennamen.
Y siguen llamándose por el apellido.
Y seguís llamándoos por el apellido.
Vous paraissiez assez peu intimes.
Vi chiamate per nome, 
ma direi che è l'unica cosa.
Vocês ainda se chamavam
pelo sobrenome e tudo.
Даже зовёте друг друга по фамилиям.