-ic bbb bbc bbh bbi bbo bcb bcc bch bci bco bhb bhc bhh bhi bho bi- bib bic bih bii bio bob boc boh boi boo c-- cbb cbc cbh cbi cbo ccb ccc cch cci cco ch- chb chc chh chi cho ci- cib cic cih cii cio co- cob coc coh coi coo h-i hbb hbc hbh hbi hbo hcb hcc hch hci hco hhb hhc hhh hhi hho hib hic hih hii hio hob hoc hoh hoi hoo ibb ibc ibh ibi ibo icb icc ich ici ico ihb ihc ihh ihi iho iib iic iih iii iio io- iob ioc ioh ioi ioo o-i ob- obb obc obh obi obo oc- ocb occ och oci oco ohc ohh ohi oho oib oic oii oio oo- oob ooc ooh ooi ooo