-er a-a a-c aaa aac aad aae aah aao aar aax ac- aca acc acd ace ach aco acr acx ad- ada adc add ade adh ado adr adx aea aec aed aee aeh aeo aer aex aha ahc ahd ahe ahh aho ahr ahx aoa aoc aod aoe aoh aoo aor aox ar- ara arc ard are arh aro arr arx ax- axa axe axh axo axr axx c-- caa cac cad cae cah cao car cax cca ccc ccd cce cch cco ccr ccx cda cdc cdd cde cdh cdo cdr cdx ce- cea cec ced cee ceh ceo cer cex ch- cha chc chd che chh cho chr chx co- coa coc cod coe coh coo cor cox cra crc crd cre crh cro crr crx cxc cxh cxo cxr cxx daa dac dad dae dah dao dar dax dca dcc dcd dce dco dcr dcx dda ddc ddd dde ddh ddo ddr ddx de- dea dec ded dee deh deo der dex dh- dha dhc dhd dhe dhh dho dhr doa doc dod doe doh doo dor dox dra drc drd dre dro drr drx dxc dxd dxo dxr dxx eaa eac ead eae eah eao ear eax ec- eca ecc ecd ece ech eco ecr ecx ed- eda edc edd ede edh edo edr edx eea eec eed eee eeo eer eex eha ehc ehd ehe ehh eho ehr eo- eoa eoc eod eoe eoh eoo eor era erc erd ere erh ero err ex- exa exc exd exe exh exo exr exx haa hac had hae hah hao har hax hca hcc hcd hce hch hco hcr hda hdc hdd hde hdh hdo hdr hdx he- hea hec hed hee heh heo her hex hha hhc hhd hhe hhh hho hhr hoa hoc hod hoe hoh hoo hor hox hr- hra hrc hrd hre hrh hro hrr hxc hxd oaa oac oad oae oah oao oar oax oc- oca occ ocd och oco ocr ocx oda odc odd ode odh odo odr oea oec oed oee oeh oeo oer oex oha ohc ohd ohe ohh oho ohr oo- ooa ooc ood ooh ooo oor oox or- ora orc ord ore orh oro orr orx ox- oxa oxc oxo oxx ra- raa rac rad rae rah rao rar rax rca rcc rcd rce rch rco rcr rcx rda rdc rdd rde rdh rdo rdr rdx re- rea rec red ree reh reo rer rex rh- rha rhc rhd rhe rhh rho rhr roa roc rod roe roh roo ror rox rra rrc rrd rrh rrr rxr xaa xac xad xar xcd xch xcr xcx xda xdc xde xdh xdr xed xee xer xex xhd xoa xoc xod xoo xor xox xrc xrd xrx xxo xxx