Back to PROP, the Origami detective
Together with her colleagues she was brought into a building. They waited pairwise each in a room opposite the corridor.
Then she was given a message and she had to communicate this message to her colleague at the opposite side. She could not speak, because the other couples would hear that. Sign language didn't work: she was not that good and the message was quite complicated.
She took a sheet of Origami paper and ...