 Hi again, in this lesson we're going to talk about that, how to make a new list of sub-lists using elements of existing lists in Python. Let's say that we have a list of lists, we have lists with few sub-lists inside our list, I'll add, for example, three sub-lists in our X list. Let's make different numbers and different number of elements in each sub-list and let's make an empty Y list. What we want to do now is to extract all elements from our list X and add them to list Y but without the first elements of our sub-lists. So we want to make three sub-lists also in our list Y but without the first elements of each list. In order to do that, we will use for loop and we'll first use a variable first element which will keep our first element of our sub-lists, we could use any name, I choose to use first element because it's descriptive and let's keep other elements from our sub-lists in variable called all other elements. So this variable will keep every first element from our sub-lists and variable all other elements will keep all other elements. So we want to loop our X list, so we'll say for first element and all other elements in X and in every iteration of our for loop we'll append all other elements to list Y, so I'll say all other elements and let's check our Y list. And as you can see our list Y also has three sub-lists and those sub-lists do not have the first element as it has our list X. So we have the same sub-lists but as sub-lists in the X list but without first elements of our sub-list. That's all for this lesson, I hope so that you understand how to work with lists and sub-lists in this example. See you in some next example, bye-bye.