Watching the girl's niece, the dialogue:
by Mitchell:
Listen, here we and Darya have a misunderstanding in the mathematical task!In the pencil there were 6 blue pencil and 9 red pencil, from there they took 3 pencil. How many wooden brushes are left in the penalty? What to answer? What is unknown?

by Rita:
HS may be misguided. There’s always that kind of stuff :)
I remember, in a textbook in Russian, when the inclination of substantive by birth took place, there were examples with the word foot. My foot, your foot, her foot, his foot, our foot, their foot. "Their leg" surprised me not,, the common leg of a group of citizens. But our leg was upset because I knew for sure that I had no common leg with anyone! :D