-ic a-a a-c a-i aaa aac aad aai aak aao aar aas ac- aca acc acd aci ack aco acr acs ad- ada adc add adi adk ado adr ads ai- aia aic aid aii aik aio air ais aka akc akd aki akk ako akr aks aoa aoc aod aoi aok aoo aor aos ar- ara arc ard ari ark aro arr ars as- asa asc asd asi ask aso asr ass c-- caa cac cad cai cak cao car cas cca ccc ccd cci cck cco ccr ccs cda cdc cdd cdi cdk cdo cdr cds ci- cia cic cid cii cik cio cir cis cka ckc ckd cki cko cks co- coa coc cod coi cok coo cor cos cra crc crd cri crk cro crr crs csa csc csd csi csk cso csr css daa dac dad dai dak dao dar das dca dcc dcd dci dck dco dcr dcs dda ddc ddd ddi ddk ddo ddr dds di- dia dic did dii dik dio dir dis dka dkc dki dkk dko dkr dks doa doc dod doi dok doo dor dos dra drc drd dri drk dro drr drs dsa dsc dsd dsi dsk dso dsr dss i-d ia- iaa iac iad iai iao iar ias ica icc icd ici ick ico icr ics ida idc idd idi idk ido idr ids iia iic iid iii iio iir iis ika ikc iki ikk iko ikr iks io- ioa ioc iod ioi ioo ior ios ir- ira irc ird iri irk iro irr irs is- isa isc isd isi isk iso isr iss ka- kaa kac kad kai kak kao kar kas kca kcc kcd kci kck kcr kcs kda kdc kdk kdo kdr kds kia kic kid kii kik kio kir kis kkc kki kkk kkr kks koa koc kod koi kok koo kor kos kra krc krd kri krk kro krr krs ksa ksc ksd ksi ksk kso ksr kss o-i oaa oac oad oai oak oao oar oas oc- oca occ ocd oci ock oco ocr ocs oda odc odd odi odo odr ods oia oic oid oii oik oio oir ois oka okc okd oki okk oko okr oks oo- ooa ooc ood ooi ook ooo oor oos or- ora orc ord ori ork oro orr ors os- osa osc osd osi osk oso osr oss ra- raa rac rad rai rak rao rar ras rca rcc rcd rci rco rcr rcs rda rdc rdd rdi rdo rdr rds ria ric rid rii rik rio rir ris rkc rkk rko rks roa roc rod roi rok roo ror ros rra rrc rrd rri rrk rrr rrs rsa rsc rsd rsi rsk rso rsr rss saa sac sad sai sak sao sar sas sca scc scd sci sck sco scr scs sda sdc sdd sdi sdk sdo sdr sds sia sic sid sii sik sio sir sis sk- ska skc skd ski skk sko skr sks soa soc sod soi sok soo sor sos sr- sra src srd sri srk sro srr srs ss- ssa ssc ssd ssi ssk sso ssr sss