1. Secret Entrance string-parsing
2. Gift Shop string-parsing regex pattern-matching
3. Lobby string-parsing recursion cursor
4. Printing Department string-parsing 2d-grid
5. Cafeteria string-parsing big-numbers disjoint-ranges
6. Trash Compactor string-parsing reduce
7. Laboratories string-parsing 2d-grid memoization dynamic-programming dfs
8. Playground string-parsing 3d-grid
9. Movie Theater string-parsing 2d-grid
10. Factory string-parsing bfs dfs z3 xor
11. Reactor string-parsing bfs dfs
12. Christmas Tree Farm string-parsing read-the-description