The nuns

https://www.setthings.com/wp-content/uploads/2008/04/silhouette-1956002.jpg Two nuns came out of the monastery to sell cakes.
One was Sister Mathematics (M), and the other Sister Logic (L).
M: It is nearing the night and we are still far from the monastery.
L: Sister, did you realize that we were following a man for over half an hour?
M: Yes, what does he wants from...

https://www.setthings.com/en/the-nuns/