Design a solution strategy for an interesting real-world problem. Present the design of a data structure combination that would be the best fit for data handling in the application design. Submit you idea with audio justifying the need for the proposed design of data structure. The data structure should have a combination of atleast 2 fundamental data structures.

Linked List of Heaps, Queue of Stacks, Stack of Heaps, etc

I'm asking for a real time application where we use atleast 2 data structures