After the first murder, Shiki's uncle, Director Shindou, is killed as well. The lab is in an uproar. To find out who the killer is, Nishinosono and Saikawa investigate Shiki's room. There they find a robot named Michiru, and a strange message saying "Everything becomes F."
That's how it judges the distance to the door.
.هذه هي الطريقة التي يحسب بها المسافة إلى الباب
Damit misst der Roboter
die Entfernung zur Tür.
Así calcula cuán lejos está de la puerta.
Así calcula cómo de lejos está de la puerta.
Michiru évalue la distance
grâce à ça.
Così misura la distanza dalla porta.
Com isso, ela mede a 
distância até a porta.