(Mishnah): If Reuven and Shimon both have four Amos and they overlap, they may bring food to the common area and eat together, as long as one does not take the other's food outside the common area.

If each of three people has four Amos and the middle one's Amos are covered by the others', he is permitted [to transfer] with each of them. They are permitted with him and forbidden with each other.

R. Shimon says, this is like three Chatzeros [in a row] open to each other and open to Reshus ha'Rabim;

If the outer Chatzeros were Me'arev with the middle Chatzer, it is permitted with them. They are permitted with it, and they are forbidden with each other.

(Gemara): Even though R. Chanina ben Antiganas argues with Rabanan about [a Techum of 2000] Amos (in Mishnah 7, he says that it is a circle, and Chachamim say that it is a square), he agrees about Iburei Ayaros (we draw straight lines from the furthest houses near the city, so the extent of the city is always a rectangle. This belongs after the following Mishnah. It was printed here mistakenly - YALKUT MAHARI'ACH, PNEI MEIR.)