The piano room is home to a locked storeroom door with a mysterious symbol. Takurou and Takeshi are sick of being jerked around by puzzles, but Hiroshi is starting to enjoy figuring them out. There’s no puzzle he can’t solve...this is a game, after all.
From an efficiency standpoint, it's a very
ineffective, time-wasting method.
.من نظرة استحقاق، إنها طريقة باطلة جدًّا ومضيعة للوقت
Das ist eine äußerst ineffiziente
und zeitintensive Methode.
En mi opinión, es ineficaz
y una pérdida de tiempo.
En mi opinión, es ineficaz
y una pérdida de tiempo.
Votre méthode est inefficace.
Vous perdez votre temps.
Vedendola dal punto di vista dell'efficienza,
è un metodo altamente improduttivo.
Pelo aspecto da eficiência, é 
um método vagaroso e ineficaz.