-ic bbb bbc bbd bbh bbi bbo bbr bbs bcb bcc bcd bch bci bco bcr bcs bdb bdc bdd bdh bdi bdo bdr bds bhb bhc bhd bhh bhi bho bhr bhs bi- bib bic bid bih bii bio bir bis bob boc bod boh boi boo bor bos brb brd brh bri bro brr brs bsb bsc bsd bsh bsi bso bsr bss c-- cbb cbc cbd cbh cbi cbo cbr cbs ccb ccc ccd cch cci cco ccr ccs cdb cdc cdd cdh cdi cdo cdr cds ch- chb chc chd chh chi cho chr chs ci- cib cic cid cih cii cio cir cis co- cob coc cod coh coi coo cor cos crb crc crd crh cri cro crr crs csb csc csd csh csi cso csr css dbb dbc dbd dbh dbi dbo dbr dbs dcb dcc dcd dci dco dcr dcs ddb ddc ddd ddh ddi ddo ddr dds dh- dhb dhc dhd dhh dhi dho dhr dhs di- dib dic did dih dii dio dir dis dob doc dod doh doi doo dor dos drb drc drd dri dro drr drs dsb dsc dsd dsh dsi dso dsr dss h-i hbb hbc hbd hbh hbi hbo hbr hbs hcb hcc hcd hch hci hco hcr hcs hdb hdc hdd hdh hdi hdo hdr hds hhb hhc hhd hhh hhi hho hhr hhs hib hic hid hih hii hio hir his hob hoc hod hoh hoi hoo hor hos hr- hrb hrc hrd hrh hri hro hrr hrs hsb hsc hsd hsh hsi hsr hss i-d ibb ibc ibd ibh ibi ibo ibr ibs icb icc icd ich ici ico icr ics idb idc idd idh idi ido idr ids ihb ihc ihd ihh ihi iho ihr ihs iib iic iid iih iii iio iir iis io- iob ioc iod ioh ioi ioo ior ios ir- irb irc ird iri iro irr irs is- isb isc isd ish isi iso isr iss o-i ob- obb obc obd obh obi obo obr obs oc- ocb occ ocd och oci oco ocr ocs odb odc odd odh odi odo odr ods ohc ohd ohh ohi oho ohr ohs oib oic oid oii oio oir ois oo- oob ooc ood ooh ooi ooo oor oos or- orb orc ord orh ori oro orr ors os- osb osc osd osh osi oso osr oss rbb rbc rbd rbh rbi rbo rbr rbs rcb rcc rcd rch rci rco rcr rcs rdb rdc rdd rdh rdi rdo rdr rds rh- rhb rhc rhd rhh rhi rho rhr rhs rib ric rid rih rii rio rir ris rob roc rod roh roi roo ror ros rrb rrc rrd rrh rri rrr rrs rsb rsc rsd rsh rsi rso rsr rss sbb sbc sbd sbh sbi sbo sbr sbs scb scc scd sch sci sco scr scs sdb sdc sdd sdh sdi sdo sdr sds sh- shb shc shd shh shi sho shr shs sib sic sid sih sii sio sir sis sob soc sod soh soi soo sor sos sr- srb src srd srh sri sro srr srs ss- ssb ssc ssd ssh ssi sso ssr sss