-er ddd dde ddh ddi ddk ddo ddr dds de- ded dee deh dei dek deo der des dh- dhd dhe dhh dhi dhk dho dhr dhs di- did die dih dii dik dio dir dis dke dki dkk dko dkr dks dod doe doh doi dok doo dor dos drd dre dri drk dro drr drs dsd dse dsh dsi dsk dso dsr dss ed- edd ede edh edi edk edo edr eds eed eee eek eeo eer ees ehd ehe ehh ehi eho ehr ehs eid eie eii eik eio eir eis ekd eke ekh eki eko ekr eks eo- eod eoe eoh eoi eok eoo eor eos erd ere erh eri erk ero err ers es- esd ese esh esi esk eso esr ess h-i hdd hde hdh hdi hdk hdo hdr hds he- hed hee heh hei hek heo her hes hhd hhe hhh hhi hhk hho hhr hhs hid hie hih hii hik hio hir his hkd hkh hki hkk hko hkr hks hod hoe hoh hoi hok hoo hor hos hr- hrd hre hrh hri hrk hro hrr hrs hsd hse hsh hsi hsk hsr hss i-d idd ide idh idi idk ido idr ids ie- ied iee iei iek ier ies ihd ihe ihh ihi ihk iho ihr ihs iid iie iih iii iio iir iis ike iki ikk iko ikr iks io- iod ioe ioh ioi ioo ior ios ir- ird ire iri irk iro irr irs is- isd ise ish isi isk iso isr iss kde kdh kdk kdo kdr kds ke- ked kee keh kei kek keo ker kes khe khh khi khk kho khr khs kid kie kih kii kik kio kir kis kke kkh kki kkk kkr kks kod koe koh koi kok koo kor kos krd kri krk kro krr krs ksd kse ksh ksi ksk kso ksr kss o-i odd ode odh odi odo odr ods oed oee oeh oei oeo oer oes ohd ohe ohh ohi oho ohr ohs oid oie oii oik oio oir ois okd oke oki okk oko okr oks oo- ood ooh ooi ook ooo oor oos or- ord ore orh ori ork oro orr ors os- osd ose osh osi osk oso osr oss rdd rde rdh rdi rdo rdr rds re- red ree reh rei rek reo rer res rh- rhd rhe rhh rhi rho rhr rhs rid rie rih rii rik rio rir ris rke rkk rko rks rod roe roh roi rok roo ror ros rrd rrh rri rrk rrr rrs rsd rse rsh rsi rsk rso rsr rss sdd sde sdh sdi sdk sdo sdr sds se- sed see seh sei sek seo ser ses sh- shd she shh shi shk sho shr shs sid sie sih sii sik sio sir sis sk- skd ske skh ski skk sko skr sks sod soe soh soi sok soo sor sos sr- srd sre srh sri srk sro srr srs ss- ssd sse ssh ssi ssk sso ssr sss