I tried different ways to solve the task but I always got a weird output. When I hit the validation button, I passed the task -.- Is still don't understand the output: I created 4 cats and 3 dogs (=7) and put them into a set. After that I deleted the 4 cats, so there should be just 3 objects!? But in the output I see 10 objects(4 Cats, 6 Dogs) which doesn't make any sense for me. com.codegym.task.task08.task0820.Solution$Cat@23fc625e com.codegym.task.task08.task0820.Solution$Dog@63961c42 com.codegym.task.task08.task0820.Solution$Dog@85ede7b com.codegym.task.task08.task0820.Solution$Cat@4f023edb com.codegym.task.task08.task0820.Solution$Dog@5674cd4d com.codegym.task.task08.task0820.Solution$Cat@3f99bd52 com.codegym.task.task08.task0820.Solution$Cat@3a71f4dd com.codegym.task.task08.task0820.Solution$Dog@63961c42 com.codegym.task.task08.task0820.Solution$Dog@85ede7b com.codegym.task.task08.task0820.Solution$Dog@5674cd4d Can someone help me to understand? Thanks in advance :)