Fish gives Postman fish a letter. Postman fish travels through a dangerous evil forest. Postman fish reaches a computer. Postman fish checks Fish's letter. It says "ls" and a key is attached. Postman fish types ls on the computer. It prints the output of the command. Postman fish copies the output of the command and travels back to Fish. Postman fish hands Fish the output of "ls" in a neat envelope with a fish sticker.