If a large roof is adjacent to a small one, the large one is permitted but the small one is prohibited. If a large courtyard was breached into a small one, the large one is permitted but the small one is prohibited, because it is like the entrance of the large one. If a courtyard was breached into a public domain, one who brings from there into a private domain, or from a private domain into it, is liable — [these are] the words of R’ Eliezer. But the Sages say: From it into the public domain, or from the public domain into it, is not liable, because it is like a karmelis.