-er a-a a-c aaa aac aad aae aah aao aar ac- aca acc acd ace ach aco acr ad- ada adc add ade adh ado adr aea aec aed aee aeh aeo aer aha ahc ahd ahe ahh aho ahr aoa aoc aod aoe aoh aoo aor ar- ara arc ard are arh aro arr c-- caa cac cad cae cah cao car cca ccc ccd cce cch cco ccr cda cdc cdd cde cdh cdo cdr ce- cea cec ced cee ceh ceo cer ch- cha chc chd che chh cho chr co- coa coc cod coe coh coo cor cra crc crd cre crh cro crr daa dac dad dae dah dao dar dca dcc dcd dce dco dcr dda ddc ddd dde ddh ddo ddr de- dea dec ded dee deh deo der dh- dha dhc dhd dhe dhh dho dhr doa doc dod doe doh doo dor dra drc drd dre dro drr eaa eac ead eae eah eao ear ec- eca ecc ecd ece ech eco ecr ed- eda edc edd ede edh edo edr eea eec eed eee eeo eer eha ehc ehd ehe ehh eho ehr eo- eoa eoc eod eoe eoh eoo eor era erc erd ere erh ero err haa hac had hae hah hao har hca hcc hcd hce hch hco hcr hda hdc hdd hde hdh hdo hdr he- hea hec hed hee heh heo her hha hhc hhd hhe hhh hho hhr hoa hoc hod hoe hoh hoo hor hr- hra hrc hrd hre hrh hro hrr oaa oac oad oae oah oao oar oc- oca occ ocd och oco ocr oda odc odd ode odh odo odr oea oec oed oee oeh oeo oer oha ohc ohd ohe ohh oho ohr oo- ooa ooc ood ooh ooo oor or- ora orc ord ore orh oro orr ra- raa rac rad rae rah rao rar rca rcc rcd rce rch rco rcr rda rdc rdd rde rdh rdo rdr re- rea rec red ree reh reo rer rh- rha rhc rhd rhe rhh rho rhr roa roc rod roe roh roo ror rra rrc rrd rrh rrr