a-a a-c aaa aac aad aah aak aao aar aas ac- aca acc acd ach ack aco acr acs ad- ada adc add adh adk ado adr ads aha ahc ahd ahh ahk aho ahr ahs aka akc akd akh akk ako akr aks aoa aoc aod aoh aok aoo aor aos ar- ara arc ard arh ark aro arr ars as- asa asc asd ash ask aso asr ass c-- caa cac cad cah cak cao car cas cca ccc ccd cch cck cco ccr ccs cda cdc cdd cdh cdk cdo cdr cds ch- cha chc chd chh chk cho chr chs cka ckc ckd ckh cko cks co- coa coc cod coh cok coo cor cos cra crc crd crh crk cro crr crs csa csc csd csh csk cso csr css daa dac dad dah dak dao dar das dca dcc dcd dck dco dcr dcs dda ddc ddd ddh ddk ddo ddr dds dh- dha dhc dhd dhh dhk dho dhr dhs dka dkc dkk dko dkr dks doa doc dod doh dok doo dor dos dra drc drd drk dro drr drs dsa dsc dsd dsh dsk dso dsr dss haa hac had hah hak hao har has hca hcc hcd hch hck hco hcr hcs hda hdc hdd hdh hdk hdo hdr hds hha hhc hhd hhh hhk hho hhr hhs hka hkd hkh hkk hko hkr hks hoa hoc hod hoh hok hoo hor hos hr- hra hrc hrd hrh hrk hro hrr hrs hsa hsc hsd hsh hsk hsr hss ka- kaa kac kad kah kak kao kar kas kca kcc kcd kch kck kcr kcs kda kdc kdh kdk kdo kdr kds kha khh khk kho khr khs kkc kkh kkk kkr kks koa koc kod koh kok koo kor kos kra krc krd krk kro krr krs ksa ksc ksd ksh ksk kso ksr kss oaa oac oad oah oak oao oar oas oc- oca occ ocd och ock oco ocr ocs oda odc odd odh odo odr ods oha ohc ohd ohh oho ohr ohs oka okc okd okk oko okr oks oo- ooa ooc ood ooh ook ooo oor oos or- ora orc ord orh ork oro orr ors os- osa osc osd osh osk oso osr oss ra- raa rac rad rah rak rao rar ras rca rcc rcd rch rco rcr rcs rda rdc rdd rdh rdo rdr rds rh- rha rhc rhd rhh rho rhr rhs rkc rkk rko rks roa roc rod roh rok roo ror ros rra rrc rrd rrh rrk rrr rrs rsa rsc rsd rsh rsk rso rsr rss saa sac sad sah sak sao sar sas sca scc scd sch sck sco scr scs sda sdc sdd sdh sdk sdo sdr sds sh- sha shc shd shh shk sho shr shs sk- ska skc skd skh skk sko skr sks soa soc sod soh sok soo sor sos sr- sra src srd srh srk sro srr srs ss- ssa ssc ssd ssh ssk sso ssr sss