-er -up ddd dde ddk ddo ddp ddr dds ddt ddu de- ded dee dek deo dep der des det deu dke dkk dko dkp dkr dks dkt dku dod doe dok doo dop dor dos dot dou dpd dpe dpk dpo dpp dpr dps dpt dpu drd dre drk dro drp drr drs drt dru dsd dse dsk dso dsp dsr dss dst dsu dtd dte dtk dto dtp dtr dts dtt dtu dud due duk duo dup dur dus dut ed- edd ede edk edo edp edr eds edt edu eed eee eek eeo eep eer ees eet ekd eke eko ekp ekr eks ekt eku eo- eod eoe eok eoo eop eor eos eot eou ep- epd epe epo epp epr eps ept epu erd ere erk ero erp err ers ert eru es- esd ese esk eso esp esr ess est esu etd ete etk eto etp etr ets ett etu eu- eud eue eup eur eus eut k-t kde kdk kdo kdp kdr kds kdt kdu ke- ked kee kek keo kep ker kes ket kke kkk kkp kkr kks kkt kku kod koe kok koo kop kor kos kot kou kpd kpe kpk kpo kpp kpr kps kpt kpu krd krk kro krp krr krs krt kru ksd kse ksk kso ksp ksr kss kst ksu kte ktk kto ktp ktr kts ktt ktu kud kue kuk kup kur kus kut kuu odd ode odo odp odr ods odt odu oed oee oeo oep oer oes oet okd oke okk oko okp okr oks oku oo- ood ook ooo oop oor oos oot op- opd ope opk opo opp opr ops opt or- ord ore ork oro orp orr ors ort oru os- osd ose osk oso osp osr oss ost osu ot- otd ote otk oto otp otr ots ott otu ou- oud oue ouk ouo oup our ous out p-p pdd pde pdk pdo pdp pdr pds pdt pdu ped pee pek peo pep per pes pet peu pkd pke pko pkp pkr pks pkt pku pod poe pok poo pop por pos pot pou ppd ppe ppk ppo ppp ppr pps ppt ppu prd pre prk pro prp prr prs prt pru ps- psd pse psk pso psp psr pss pst psu pt- ptd pte ptk pto ptp ptr pts ptt ptu pud pue puk pup pur pus put puu rdd rde rdo rdp rdr rds rdt rdu re- red ree rek reo rep rer res ret reu rke rkk rko rkp rks rkt rku rod roe rok roo rop ror ros rot rou rpd rpe rpk rpo rpp rpr rps rpt rpu rrd rrk rrp rrr rrs rrt rru rsd rse rsk rso rsp rsr rss rst rsu rtd rte rtk rto rtp rtr rts rtt rtu rud rue ruk ruo rup rur rus rut ruu sdd sde sdk sdo sdp sdr sds sdt sdu se- sed see sek seo sep ser ses set seu sk- skd ske skk sko skp skr sks skt sku sod soe sok soo sop sor sos sot sou spd spe spk spo spp spr sps spt spu sr- srd sre srk sro srp srr srs srt ss- ssd sse ssk sso ssp ssr sss sst ssu std ste stk sto stp str sts stt stu sud sue suk suo sup sur sus sut suu tdd tde tdk tdo tdp tdr tds tdt tdu te- ted tee tek teo tep ter tes tet teu tke tkk tko tkp tkr tks tkt to- tod toe tok too top tor tos tot tou tpd tpe tpk tpo tpp tpr tps tpt tpu trd tre trk tro trp trr trs trt tru tsd tse tsk tso tsp tsr tss tst tsu ttd tte ttk tto ttp ttr tts ttt ttu tud tue tuk tuo tup tur tus tut tuu udd ude udk udo udp udr uds udt udu ued uee uep uer ues uet uke ukk ukp ukr uku uod uoe uok uoo uop uor uos uot up- upd upe upk upo upp upr ups upt upu ur- urd ure urk uro urp urr urs urt uru usd use usk uso usp usr uss ust usu utd ute utk uto utp utr uts utt utu uue uur uus uut uuu