README.md

Extraction 1

Author: Marin Radu

Description

Isolate a unique line from the given text file using regular expressions.

Requirements

• Regex
• grep

Solve

Use grep to exclude lines that match the specific pattern:

grep -E -v '^[A-Z]{4}[a-z]{6}\d[A-Z]\d{2}[a-zA-Z]{6}$' file.txt

You can also use my script: solve.py

Flag: CSCTF{FGMQzggbiy3E864BQbpr}