18. Hands-On: B
- Change directory to hands_on_B:
    
 - You will find a file called letter.tex.  Use gedit, or your
    favourite editor, to edit this file to compose a letter of your choice.
    (For example, write a letter to your MP concerning the delays of trains
    between Liverpool and Manchester.)
 - You will also find a file called lists.tex.  Edit this file
    to produce a list of lists of lists — experiment with the
    three environments.  (For example, make a list of different bits of 
    software available for preparing documents, there strong points and
    weak points, and workarounds for each weak point, with examples
    of use for each strong point:  e.g., LaTeX, mathematics, submission to
    journals.
 - Finally, you will find a "structured document".  First, compile it
    — twice — and (pre-)view it.  Notice the table of contents.  
    Add some sections, subsections and subsubsections of your own.