english: The one which was tapping phone calls was completely separated from the one which controlled the letters, for good reasons, because if one agent quit the Stasi, his knowledge was very small.
non_english: Tisti, ki so prisluškovali telefonom, so bili povsem ločeni od tistih, ki so nadzorovali pošto, kar je imelo dober razlog: če je agent zapustil Stasi, je s seboj odnesel zelo malo znanja.