-ic a-a a-b a-c a-i aaa aab aac aad aai aak aao aar aas ab- aba abb abc abd abi abk abo abr abs ac- aca acb acc acd aci ack aco acr acs ad- ada adb adc add adi adk ado adr ads ai- aia aib aic aid aii aik aio air ais aka akb akc akd aki akk ako akr aks aoa aob aoc aod aoi aok aoo aor aos ar- ara arb arc ard ari ark aro arr ars as- asa asb asc asd asi ask aso asr ass baa bab bac bad bai bak bao bar bas bba bbb bbc bbd bbi bbk bbo bbr bbs bca bcb bcc bcd bci bck bco bcr bcs bda bdb bdc bdd bdi bdk bdo bdr bds bi- bia bib bic bid bii bik bio bir bis bka bkb bkc bkk bko bkr bks boa bob boc bod boi bok boo bor bos bra brb brd bri brk bro brr brs bsa bsb bsc bsd bsi bsk bso bsr bss c-- caa cab cac cad cai cak cao car cas cba cbb cbc cbd cbi cbk cbo cbr cbs cca ccb ccc ccd cci cck cco ccr ccs cda cdb cdc cdd cdi cdk cdo cdr cds ci- cia cib cic cid cii cik cio cir cis cka ckb ckc ckd cki cko cks co- coa cob coc cod coi cok coo cor cos cra crb crc crd cri crk cro crr crs csa csb csc csd csi csk cso csr css daa dab dac dad dai dak dao dar das dba dbb dbc dbd dbi dbk dbo dbr dbs dca dcb dcc dcd dci dck dco dcr dcs dda ddb ddc ddd ddi ddk ddo ddr dds di- dia dib dic did dii dik dio dir dis dka dkb dkc dki dkk dko dkr dks doa dob doc dod doi dok doo dor dos dra drb drc drd dri drk dro drr drs dsa dsb dsc dsd dsi dsk dso dsr dss i-d ia- iaa iab iac iad iai iao iar ias iba ibb ibc ibd ibi ibk ibo ibr ibs ica icb icc icd ici ick ico icr ics ida idb idc idd idi idk ido idr ids iia iib iic iid iii iio iir iis ika ikb ikc iki ikk iko ikr iks io- ioa iob ioc iod ioi ioo ior ios ir- ira irb irc ird iri irk iro irr irs is- isa isb isc isd isi isk iso isr iss ka- kaa kab kac kad kai kak kao kar kas kba kbb kbc kbd kbi kbk kbo kbr kbs kca kcb kcc kcd kci kck kcr kcs kda kdb kdc kdk kdo kdr kds kia kib kic kid kii kik kio kir kis kkb kkc kki kkk kkr kks koa kob koc kod koi kok koo kor kos kra krc krd kri krk kro krr krs ksa ksb ksc ksd ksi ksk kso ksr kss o-i oaa oab oac oad oai oak oao oar oas ob- oba obb obc obd obi obk obo obr obs oc- oca ocb occ ocd oci ock oco ocr ocs oda odb odc odd odi odo odr ods oia oib oic oid oii oik oio oir ois oka okb okc okd oki okk oko okr oks oo- ooa oob ooc ood ooi ook ooo oor oos or- ora orb orc ord ori ork oro orr ors os- osa osb osc osd osi osk oso osr oss ra- raa rab rac rad rai rak rao rar ras rba rbb rbc rbd rbi rbk rbo rbr rbs rca rcb rcc rcd rci rco rcr rcs rda rdb rdc rdd rdi rdo rdr rds ria rib ric rid rii rik rio rir ris rkb rkc rkk rko rks roa rob roc rod roi rok roo ror ros rra rrb rrc rrd rri rrk rrr rrs rsa rsb rsc rsd rsi rsk rso rsr rss saa sab sac sad sai sak sao sar sas sba sbb sbc sbd sbi sbk sbo sbr sbs sca scb scc scd sci sck sco scr scs sda sdb sdc sdd sdi sdk sdo sdr sds sia sib sic sid sii sik sio sir sis sk- ska skb skc skd ski skk sko skr sks soa sob soc sod soi sok soo sor sos sr- sra srb src srd sri srk sro srr srs ss- ssa ssb ssc ssd ssi ssk sso ssr sss

a-ak a-do a-ii a-ok aaaa aaab aaac aaad aaai aaar aaas aaba aabb aabc aabd aabi aaca aacb aacc aacd aaci aack aaco aacr aacs aada aadc aadi aads aaib aaic aaii aais aaka aaoo aara aarc aard aari aaro aars aasa aasc aasd aasi aass abaa abab abac abad abai abak abar abas abb- abba abbb abbi abbo abbr abbs abca abcb abcc abcd abci abcr abcs abda abdi abdo abia abib abic abid abir abis aboa abob abod abok aboo abor abos abra abrc abri abro abrs abs- absa absd absi abss acaa acab acac acad acai acar acas acba acca accc accd acci acco accs acda acdb acdc acdi acds aci- acia acic acid acir acis ackd acks acoa acod acor acos acr- acra acrc acri acro acrr acrs acsa acsc acsd acsi acss adaa adab adac adad adai adak adao adar adas adba adbc adbi adcc adci adcs adda addc addd addi addo addr adds adia adib adic adik adio adir adis adki adob adoc adod adok adoo ador ados adra adro adrs adsa adsi adso adsr adss aiai aias aiba aibo aica aicc aicd aicr aics aida aidb aidc aidi aidr aids aiia aiib aiic aiid aiir aika aiki aiko aiks aioc aioi aira aird airi airo airs aisa aisb aisd aisi aisk aiso aisr akaa akai akao akar akas akca akia akid akik akio akir akis akka akki akko akok akos akr- akra aksa aksi aoba aoca aocs aoki aoks aora aorb aors aosd aoss arab arac arad arai arak arar aras arba arbi arbs arc- arca arci