also I have asked this question to myself)

• first we separate lines with split
• alter we try to get first part of line (which have started by mark)

like:

• "word @word # comment"
• "word @word ", "comment" - save this for check another mark
• "word ", "word " - don't forget that you need delete last space))

hope this help with understanding

I see that it works by running it, but not even with debugging I understand what is going on here. "parts" is being rewritten for every marker and somehow the result takes into account all the markers? Any help would be appreciate it!