Fukuzawa and Fukuchi confront their shared past as time runs out for the Detective Agency.
but its design philosophy was to ensure 
that it would be difficult to open.
.لكن فلسفة تصميمه كانت لضمان صعوبة فتحه
mais l’intérêt du système réside
dans son ouverture difficile.
ma è stato progettato di modo
da essere difficile da aprire.
só que o objetivo do design era
garantir que fosse difícil de abrir.
а значит, спроектирована так,
чтобы её тяжело было открыть.