-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aak aao aar aas ab- aba abb abc abe abh abi abk abo abr abs ac- aca acb acc ace ach aci ack aco acr acs aea aeb aec aee aeh aei aek aeo aer aes aha ahb ahc ahe ahh ahi ahk aho ahr ahs ai- aia aib aic aie aih aii aik aio air ais aka akb akc ake akh aki akk ako akr aks aoa aob aoc aoe aoh aoi aok aoo aor aos ar- ara arb arc are arh ari ark aro arr ars as- asa asb asc ase ash asi ask aso asr ass baa bab bac bae bah bai bak bao bar bas bba bbb bbc bbe bbh bbi bbk bbo bbr bbs bca bcb bcc bce bch bci bck bco bcr bcs be- bea beb bec bee beh bei bek beo ber bes bha bhb bhc bhe bhh bhi bhk bho bhr bhs bi- bia bib bic bie bih bii bik bio bir bis bka bkb bkc bke bkk bko bkr bks boa bob boc boe boh boi bok boo bor bos bra brb bre brh bri brk bro brr brs bsa bsb bsc bse bsh bsi bsk bso bsr bss c-- caa cab cac cae cah cai cak cao car cas cba cbb cbc cbe cbh cbi cbk cbo cbr cbs cca ccb ccc cce cch cci cck cco ccr ccs ce- cea ceb cec cee ceh cei cek ceo cer ces ch- cha chb chc che chh chi chk cho chr chs ci- cia cib cic cie cih cii cik cio cir cis cka ckb ckc ckh cki cko cks co- coa cob coc coe coh coi cok coo cor cos cra crb crc cre crh cri crk cro crr crs csa csb csc cse csh csi csk cso csr css eaa eab eac eae eah eai eak eao ear eas eba ebb ebc ebe ebh ebi ebk ebo ebr ebs ec- eca ecb ecc ece ech eci eck eco ecr ecs eea eeb eec eee eek eeo eer ees eha ehb ehc ehe ehh ehi eho ehr ehs eia eib eic eie eii eik eio eir eis eka ekb ekc eke ekh eki eko ekr eks eo- eoa eob eoc eoe eoh eoi eok eoo eor eos era erb erc ere erh eri erk ero err ers es- esa esb esc ese esh esi esk eso esr ess h-i haa hab hac hae hah hai hak hao har has hba hbb hbc hbe hbh hbi hbk hbo hbr hbs hca hcb hcc hce hch hci hck hco hcr hcs he- hea heb hec hee heh hei hek heo her hes hha hhb hhc hhe hhh hhi hhk hho hhr hhs hia hib hic hie hih hii hik hio hir his hka hkb hkh hki hkk hko hkr hks hoa hob hoc hoe hoh hoi hok hoo hor hos hr- hra hrb hrc hre hrh hri hrk hro hrr hrs hsa hsb hsc hse hsh hsi hsk hsr hss ia- iaa iab iac iae iah iai iao iar ias iba ibb ibc ibe ibh ibi ibk ibo ibr ibs ica icb icc ice ich ici ick ico icr ics ie- iea iec iee iei iek ier ies iha ihb ihc ihe ihh ihi ihk iho ihr ihs iia iib iic iie iih iii iio iir iis ika ikb ikc ike iki ikk iko ikr iks io- ioa iob ioc ioe ioh ioi ioo ior ios ir- ira irb irc ire iri irk iro irr irs is- isa isb isc ise ish isi isk iso isr iss ka- kaa kab kac kae kah kai kak kao kar kas kba kbb kbc kbe kbh kbi kbk kbo kbr kbs kca kcb kcc kce kch kci kck kcr kcs ke- kea keb kec kee keh kei kek keo ker kes kha khe khh khi khk kho khr khs kia kib kic kie kih kii kik kio kir kis kkb kkc kke kkh kki kkk kkr kks koa kob koc koe koh koi kok koo kor kos kra krc kri krk kro krr krs ksa ksb ksc kse ksh ksi ksk kso ksr kss o-i oaa oab oac oae oah oai oak oao oar oas ob- oba obb obc obe obh obi obk obo obr obs oc- oca ocb occ och oci ock oco ocr ocs oea oeb oec oee oeh oei oeo oer oes oha ohc ohe ohh ohi oho ohr ohs oia oib oic oie oii oik oio oir ois oka okb okc oke oki okk oko okr oks oo- ooa oob ooc ooh ooi ook ooo oor oos or- ora orb orc ore orh ori ork oro orr ors os- osa osb osc ose osh osi osk oso osr oss ra- raa rab rac rae rah rai rak rao rar ras rba rbb rbc rbe rbh rbi rbk rbo rbr rbs rca rcb rcc rce rch rci rco rcr rcs re- rea reb rec ree reh rei rek reo rer res rh- rha rhb rhc rhe rhh rhi rho rhr rhs ria rib ric rie rih rii rik rio rir ris rkb rkc rke rkk rko rks roa rob roc roe roh roi rok roo ror ros rra rrb rrc rrh rri rrk rrr rrs rsa rsb rsc rse rsh rsi rsk rso rsr rss saa sab sac sae sah sai sak sao sar sas sba sbb sbc sbe sbh sbi sbk sbo sbr sbs sca scb scc sce sch sci sck sco scr scs se- sea seb sec see seh sei sek seo ser ses sh- sha shb shc she shh shi shk sho shr shs sia sib sic sie sih sii sik sio sir sis sk- ska skb skc ske skh ski skk sko skr sks soa sob soc soe soh soi sok soo sor sos sr- sra srb src sre srh sri srk sro srr srs ss- ssa ssb ssc sse ssh ssi ssk sso ssr sss