How to think about implementation of such things. Since everything is a list, and then a list of lists. You must begin with learning atomic list operations. Th

How to think about implementation of such things. Since everything is a list, and then a list of lists. You must begin with learning atomic list operations. Them being- 1. Accessing the first element of a list. 2. Accessing the remainder of a list. 3. Using 1. and 2. You can iterate a list. 4. Once you can iterate a list, you can iterate two lists. To find common elements, or element common to lists based on a criteria. 5. Swap elements, store elements etc. Ideally all operations can be built from learning list operations.