remove text from text - 2

I need to remove a multi-line text (contained in a file) from another text file but only the first occurrence
I have Windows so I can use Visual Basic but I also have gnuwin32 so I can use tools like grep, sed, etc
Therefore I need a solution using scripts that can run from command line (not c++ programs)

I was searching for this but what I could find was grep solutions that delete all occurrences of the lines searched, and not in the order they exist in the searched multi-line pattern
https://stackoverflow.com/questions/174472/deleting-multiline-text-from-multiple-files
https://askubuntu.com/questions/637639/delete-multiple-lines-from-file-when-text-is-found

The text file looks like this:

the
quick
the
brown
quick
brown
fox
jumps

And I need to remove the lines
quick
brown
fox
And then the result will be:

the
quick
the
brown
jumps



I managed to find a very complicated solution:
- transform the newlines into a special character "@"
- read the content of the first file into a variable
- use sed to remove the line from the second file
- transform again the special character "@" into newline

However this is quite a mess for very large files that can contain the "@" character

This is my script:

[QUOTE]cat a.txt | tr -d "\r" | tr "\n" "@" > a1.txt
cat b.txt | tr -d "\r" | tr "\n" "@" > b1.txt

set /p MyText=<a1.txt

sed -e "s/%MyText%//" b1.txt | tr "@" "\n"
pause[/QUOTE]