1. Type vim hello.txt.
  2. Press $ (Shift-4) that will jump to the end of the current line.
  3. Press Ctrl-v to switch to visual mode.
  4. Press j 3 time to mark 3 additional rows.
  5. Press A (Shift a) to switch to insert mode appending to the end of the row.
  6. Type in " end"
  7. Press ESC
  8. After a secon " end" will appear at the end of 3 other lines.
  9. Type :wq to write and quit.