## Diagram: Sudoku Rules, Input/Output Format, and Examples
### Overview
The image presents a description of Sudoku rules, input and output formats, and solved examples in textual representation. It's divided into four sections, each with a title and a list of bullet points explaining the respective topic.
### Components/Axes
* **Header 1 (Top, Orange):** "Natural Language Description of Rules (NL(C))"
* Rules for solving the Sudoku grid.
* **Header 2 (Middle-Top, Blue):** "Natural Language Description of Input Format (NL(X))"
* Description of the input format for the Sudoku grid.
* **Header 3 (Middle-Bottom, Green):** "Natural Language Description of Output Format (NL(Y))"
* Description of the output format for the Sudoku grid.
* **Header 4 (Bottom, Gray):** "Solved Examples in their Textual Representation (Dp)"
* Examples of input and output grids.
### Detailed Analysis
**1. Natural Language Description of Rules (NL(C))**
* Empty cells of the grid must be filled using numbers from 1 to n.
* Each row must have each number from 1 to n exactly once.
* Each column must have each number from 1 to n exactly once.
* Each of the n non-overlapping sub-grids of size √n × √n must have each number from 1 to n exactly once.
* n is a perfect square.
**2. Natural Language Description of Input Format (NL(X))**
* There are n rows and n columns representing the n × n unsolved grid.
* Each row represents the corresponding unsolved row of the grid.
* Each row has n space separated numbers ranging from 0 to n representing the corresponding cells in the grid.
* Empty cells are indicated by 0s.
* The other filled cells will have numbers from 1 to n.
**3. Natural Language Description of Output Format (NL(Y))**
* There are n rows and n columns representing the n × n solved grid.
* Each row represents the corresponding solved row of the grid.
* Each row has n space separated numbers ranging from 1 to n representing the corresponding cells of the solved grid.
**4. Solved Examples in their Textual Representation (Dp)**
The examples show two sets of input and output grids. Each grid is 4x4.
* **Input - 1:**
