Tell me a tool designed to compare and merge files or folders. I need to parse the information from the three folders. I do not need to synchronize directories, the structure of the three folders is completely different. I need from the first folder (in which there are a lot of files and subdirectories) to delete everything that is in the second folder (in which there are also a lot of files and subdirectories). And then combine them together and compare it with the third folder.