Polybius Square Encryption in Python

# Introduction

In this project, you will learn how to implement the Polybius square encryption algorithm. The Polybius square is a 5x5 grid that maps each letter of the English alphabet to a pair of coordinates. By encrypting text using this method, you can create a coded message that can only be decrypted by someone with knowledge of the Polybius square.

## 👀 Preview

# Example 1
text = "tynam"; encryption_text = "4454331132"
# Example 2
text = "tynam123"; encryption_text = "4454331132123"
# Example 3
text = "TYnam"; encryption_text = "4454331132"
# Example 4
text = None; encryption_text = None

## 🎯 Tasks

In this project, you will learn:

- How to define the Polybius square
- How to remove spaces and convert text to lowercase
- How to handle empty or `None` input
- How to encrypt text using the Polybius square
- How to return the encrypted text

## 🏆 Achievements

After completing this project, you will be able to:

- Understand the concept of the Polybius square encryption algorithm
- Implement the Polybius encryption algorithm in Python
- Encrypt and decrypt text using the Polybius square
- Handle various input scenarios, including empty or `None` input