| +----------------+----------------+----------------+----------------+----------------+-------------+ | |
| |~~~ a ~~~|~~~ b ~~~|~~~ c ~~~|~~~ d ~~~|~~~ e ~~~|~~~ f ~~~| | |
| +----------------+----------------+----------------+----------------+----------------+-------------+ | |
| |~~~ g ~~~|~~~ h ~~~|~~~ i ~~~|~~~ j ~~~|~~~ k ~~~|~~~ l ~~~| | |
| +----------------+----------------+----------------+----------------+----------------+-------------+ |