What is "if mc021-1.jpg and mc021-2.jpg?

Without the full context or any additional information, it is difficult to provide specific information about "if mc021-1.jpg and mc021-2.jpg." However, it is possible that mc021-1.jpg and mc021-2.jpg are file names of images or documents that are related in some way. They could be part of a series, a comparison, or a set of related visuals. If you provide more details or context, I would be able to give more specific information.