a-a a-c aaa aac aad aah aak aao aar ac- aca acc acd ach ack aco acr ad- ada adc add adh adk ado adr aha ahc ahd ahh ahk aho ahr aka akc akd akh akk ako akr aoa aoc aod aoh aok aoo aor ar- ara arc ard arh ark aro arr c-- caa cac cad cah cak cao car cca ccc ccd cch cck cco ccr cda cdc cdd cdh cdk cdo cdr ch- cha chc chd chh chk cho chr cka ckc ckd ckh cko co- coa coc cod coh cok coo cor cra crc crd crh crk cro crr daa dac dad dah dak dao dar dca dcc dcd dck dco dcr dda ddc ddd ddh ddk ddo ddr dh- dha dhc dhd dhh dhk dho dhr dka dkc dkk dko dkr doa doc dod doh dok doo dor dra drc drd drk dro drr haa hac had hah hak hao har hca hcc hcd hch hck hco hcr hda hdc hdd hdh hdk hdo hdr hha hhc hhd hhh hhk hho hhr hka hkd hkh hkk hko hkr hoa hoc hod hoh hok hoo hor hr- hra hrc hrd hrh hrk hro hrr ka- kaa kac kad kah kak kao kar kca kcc kcd kch kck kcr kda kdc kdh kdk kdo kdr kha khh khk kho khr kkc kkh kkk kkr koa koc kod koh kok koo kor kra krc krd krk kro krr oaa oac oad oah oak oao oar oc- oca occ ocd och ock oco ocr oda odc odd odh odo odr oha ohc ohd ohh oho ohr oka okc okd okk oko okr oo- ooa ooc ood ooh ook ooo oor or- ora orc ord orh ork oro orr ra- raa rac rad rah rak rao rar rca rcc rcd rch rco rcr rda rdc rdd rdh rdo rdr rh- rha rhc rhd rhh rho rhr rkc rkk rko roa roc rod roh rok roo ror rra rrc rrd rrh rrk rrr