-ic bbb bbc bbh bbi bbo bbs bcb bcc bch bci bco bcs bhb bhc bhh bhi bho bhs bi- bib bic bih bii bio bis bob boc boh boi boo bos bsb bsc bsh bsi bso bss c-- cbb cbc cbh cbi cbo cbs ccb ccc cch cci cco ccs ch- chb chc chh chi cho chs ci- cib cic cih cii cio cis co- cob coc coh coi coo cos csb csc csh csi cso css h-i hbb hbc hbh hbi hbo hbs hcb hcc hch hci hco hcs hhb hhc hhh hhi hho hhs hib hic hih hii hio his hob hoc hoh hoi hoo hos hsb hsc hsh hsi hss ibb ibc ibh ibi ibo ibs icb icc ich ici ico ics ihb ihc ihh ihi iho ihs iib iic iih iii iio iis io- iob ioc ioh ioi ioo ios is- isb isc ish isi iso iss o-i ob- obb obc obh obi obo obs oc- ocb occ och oci oco ocs ohc ohh ohi oho ohs oib oic oii oio ois oo- oob ooc ooh ooi ooo oos os- osb osc osh osi oso oss sbb sbc sbh sbi sbo sbs scb scc sch sci sco scs sh- shb shc shh shi sho shs sib sic sih sii sio sis sob soc soh soi soo sos ss- ssb ssc ssh ssi sso sss