import re

with open("extracted_raw.txt", "r", encoding="utf-8") as f:
    text = f.read()

# Replace "Trang 1" with "Trang 12", "Trang 2" with "Trang 13", etc.
for i in range(9, 0, -1):
    text = re.sub(rf"^Trang {i}$", f"Trang {i+11}", text, flags=re.MULTILINE)
    text = re.sub(rf"^Trang {i}\n", f"Trang {i+11}\n", text, flags=re.MULTILINE)

with open("extracted_final.txt", "w", encoding="utf-8") as f:
    f.write(text)