01234567890123456789012345678901234567890123456
|         |         |         |         |      

tabs at eight:
|       |       |       |       |       |       |
   a   bb   ccc   dddd   eeeee   fffffff

tabs at four:
|   |   |   |   |   |   |   |   |   |   |   |   
   a   bb   ccc   dddd   eeeee

tabs at three:
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
   a   bb   ccc   dddd
