-er ddd dde ddh ddk ddo ddr dds de- ded dee deh dek deo der des dh- dhd dhe dhh dhk dho dhr dhs dke dkk dko dkr dks dod doe doh dok doo dor dos drd dre drk dro drr drs dsd dse dsh dsk dso dsr dss ed- edd ede edh edk edo edr eds eed eee eek eeo eer ees ehd ehe ehh eho ehr ehs ekd eke ekh eko ekr eks eo- eod eoe eoh eok eoo eor eos erd ere erh erk ero err ers es- esd ese esh esk eso esr ess hdd hde hdh hdk hdo hdr hds he- hed hee heh hek heo her hes hhd hhe hhh hhk hho hhr hhs hkd hkh hkk hko hkr hks hod hoe hoh hok hoo hor hos hr- hrd hre hrh hrk hro hrr hrs hsd hse hsh hsk hsr hss kde kdh kdk kdo kdr kds ke- ked kee keh kek keo ker kes khe khh khk kho khr khs kke kkh kkk kkr kks kod koe koh kok koo kor kos krd krk kro krr krs ksd kse ksh ksk kso ksr kss odd ode odh odo odr ods oed oee oeh oeo oer oes ohd ohe ohh oho ohr ohs okd oke okk oko okr oks oo- ood ooh ook ooo oor oos or- ord ore orh ork oro orr ors os- osd ose osh osk oso osr oss rdd rde rdh rdo rdr rds re- red ree reh rek reo rer res rh- rhd rhe rhh rho rhr rhs rke rkk rko rks rod roe roh rok roo ror ros rrd rrh rrk rrr rrs rsd rse rsh rsk rso rsr rss sdd sde sdh sdk sdo sdr sds se- sed see seh sek seo ser ses sh- shd she shh shk sho shr shs sk- skd ske skh skk sko skr sks sod soe soh sok soo sor sos sr- srd sre srh srk sro srr srs ss- ssd sse ssh ssk sso ssr sss