Editor
  1. normal normal
  2. empty empty
  3. inv inv
  4. invempty invempty
  5. dot dot
  6. odot odot
  7. invdot invdot
  8. invodot invodot
  9. diamond diamond
  10. odiamond odiamond
  11. ediamond ediamond
  12. none none
  13. tee tee
  14. box box
  15. obox obox
  16. open open
  17. vee vee
  18. halfopen halfopen
  19. crow crow