-er -ic a-a a-b a-c a-i a-t aaa aab aac aad aae aai aak aao aar aas aat ab- aba abb abc abd abe abi abk abo abr abs abt ac- aca acb acc acd ace aci ack aco acr acs act ad- ada adb adc add ade adi adk ado adr ads adt aea aeb aec aed aee aei aek aeo aer aes aet ai- aia aib aic aid aie aii aik aio air ais ait aka akb akc akd ake aki akk ako akr aks aoa aob aoc aod aoe aoi aok aoo aor aos aot ar- ara arb arc ard are ari ark aro arr ars art as- asa asb asc asd ase asi ask aso asr ass ast at- ata atb atc atd ate ati ato atr ats att baa bab bac bad bae bai bak bao bar bas bat bba bbb bbc bbd bbe bbi bbk bbo bbr bbs bbt bca bcb bcc bcd bce bci bck bco bcr bcs bct bda bdb bdc bdd bde bdi bdk bdo bdr bds bdt be- bea beb bec bed bee bei bek beo ber bes bet bi- bia bib bic bid bie bii bik bio bir bis bit bka bkb bkc bke bkk bko bkr bks bkt boa bob boc bod boe boi bok boo bor bos bot bra brb brd bre bri brk bro brr brs brt bsa bsb bsc bsd bse bsi bsk bso bsr bss bst bta btb btc btd bte bti btk bto btr bts btt c-- caa cab cac cad cae cai cak cao car cas cat cba cbb cbc cbd cbe cbi cbk cbo cbr cbs cbt cca ccb ccc ccd cce cci cck cco ccr ccs cct cda cdb cdc cdd cde cdi cdk cdo cdr cds cdt ce- cea ceb cec ced cee cei cek ceo cer ces cet ci- cia cib cic cid cie cii cik cio cir cis cit cka ckb ckc ckd cki cko cks ckt co- coa cob coc cod coe coi cok coo cor cos cot cra crb crc crd cre cri crk cro crr crs crt csa csb csc csd cse csi csk cso csr css cst cta ctb ctc ctd cte cti ctk cto ctr cts ctt daa dab dac dad dae dai dak dao dar das dat dba dbb dbc dbd dbe dbi dbk dbo dbr dbs dbt dca dcb dcc dcd dce dci dck dco dcr dcs dct dda ddb ddc ddd dde ddi ddk ddo ddr dds ddt de- dea deb dec ded dee dei dek deo der des det di- dia dib dic did die dii dik dio dir dis dit dka dkb dkc dke dki dkk dko dkr dks dkt doa dob doc dod doe doi dok doo dor dos dot dra drb drc drd dre dri drk dro drr drs drt dsa dsb dsc dsd dse dsi dsk dso dsr dss dst dta dtb dtc dtd dte dti dtk dto dtr dts dtt eaa eab eac ead eae eai eak eao ear eas eat eba ebb ebc ebd ebe ebi ebk ebo ebr ebs ebt ec- eca ecb ecc ecd ece eci eck eco ecr ecs ect ed- eda edb edc edd ede edi edk edo edr eds edt eea eeb eec eed eee eek eeo eer ees eet eia eib eic eid eie eii eik eio eir eis eit eka ekb ekc ekd eke eki eko ekr eks ekt eo- eoa eob eoc eod eoe eoi eok eoo eor eos eot era erb erc erd ere eri erk ero err ers ert es- esa esb esc esd ese esi esk eso esr ess est eta etb etc etd ete eti etk eto etr ets ett i-d ia- iaa iab iac iad iae iai iao iar ias iat iba ibb ibc ibd ibe ibi ibk ibo ibr ibs ibt ica icb icc icd ice ici ick ico icr ics ict ida idb idc idd ide idi idk ido idr ids idt ie- iea iec ied iee iei iek ier ies iet iia iib iic iid iie iii iio iir iis iit ika ikb ikc ike iki ikk iko ikr iks ikt io- ioa iob ioc iod ioe ioi ioo ior ios iot ir- ira irb irc ird ire iri irk iro irr irs irt is- isa isb isc isd ise isi isk iso isr iss ist ita itb itc itd ite iti itk ito its itt k-t ka- kaa kab kac kad kae kai kak kao kar kas kat kba kbb kbc kbd kbe kbi kbk kbo kbr kbs kca kcb kcc kcd kce kci kck kcr kcs kct kda kdb kdc kde kdk kdo kdr kds kdt ke- kea keb kec ked kee kei kek keo ker kes ket kia kib kic kid kie kii kik kio kir kis kit kkb kkc kke kki kkk kkr kks kkt koa kob koc kod koe koi kok koo kor kos kot kra krc krd kri krk kro krr krs krt ksa ksb ksc ksd kse ksi ksk kso ksr kss kst kta ktb ktc kte ktk kto ktr kts ktt o-i oaa oab oac oad oae oai oak oao oar oas oat ob- oba obb obc obd obe obi obk obo obr obs obt oc- oca ocb occ ocd oci ock oco ocr ocs oct oda odb odc odd ode odi odo odr ods odt oea oeb oec oed oee oei oeo oer oes oet oia oib oic oid oie oii oik oio oir ois oit oka okb okc okd oke oki okk oko okr oks oo- ooa oob ooc ood ooi ook ooo oor oos oot or- ora orb orc ord ore ori ork oro orr ors ort os- osa osb osc osd ose osi osk oso osr oss ost ot- ota otb otc otd ote oti otk oto otr ots ott ra- raa rab rac rad rae rai rak rao rar ras rat rba rbb rbc rbd rbe rbi rbk rbo rbr rbs rbt rca