-er a-a a-c aaa aac aae aah aam aao aar aax ac- aca acc ace ach acm aco acr acx aea aec aee aeh aem aeo aer aex aha ahc ahe ahh ahm aho ahr ahx ama amc ame amh amm amo amr amx aoa aoc aoe aoh aom aoo aor aox ar- ara arc are arh arm aro arr arx ax- axa axe axh axm axo axr axx c-- caa cac cae cah cam cao car cax cca ccc cce cch ccm cco ccr ccx ce- cea cec cee ceh cem ceo cer cex ch- cha chc che chh chm cho chr chx cma cmc cme cmh cmm cmo cmr cmx co- coa coc coe coh com coo cor cox cra crc cre crh crm cro crr crx cxc cxh cxo cxr cxx eaa eac eae eah eam eao ear eax ec- eca ecc ece ech ecm eco ecr ecx eea eec eee eem eeo eer eex eha ehc ehe ehh ehm eho ehr em- ema emc eme emh emm emo emr emx eo- eoa eoc eoe eoh eom eoo eor era erc ere erh erm ero err ex- exa exc exe exh exo exr exx haa hac hae hah ham hao har hax hca hcc hce hch hcm hco hcr he- hea hec hee heh hem heo her hex hha hhc hhe hhh hhm hho hhr hma hmc hme hmh hmm hmo hmr hmx hoa hoc hoe hoh hom hoo hor hox hr- hra hrc hre hrh hrm hro hrr hxc hxm m-o m-r maa mac mae mah mam mao mar max mc- mca mcc mce mch mcm mco mcr mcx mea mec mee meh mem meo mer mex mha mhc mhh mhm mho mhr mhx mma mmc mme mmh mmm mmo mmr mmx moa moc moe moh mom moo mor mox mra mrc mre mrh mrm mro mrr mrx mxa mxc mxr oaa oac oae oah oam oao oar oax oc- oca occ och ocm oco ocr ocx oea oec oee oeh oem oeo oer oex oha ohc ohe ohh ohm oho ohr om- oma omc ome omh omm omo omr omx oo- ooa ooc ooh oom ooo oor oox or- ora orc ore orh orm oro orr orx ox- oxa oxc oxo oxx ra- raa rac rae rah ram rao rar rax rca rcc rce rch rcm rco rcr rcx re- rea rec ree reh rem reo rer rex rh- rha rhc rhe rhh rhm rho rhr rma rmc rme rmh rmm rmo rmr rmx roa roc roe roh rom roo ror rox rra rrc rrh rrm rrr rxr xaa xac xam xar xch xcr xcx xee xem xer xex xma xmc xmh xmm xmo xmr xmx xoa xoc xom xoo xor xox xrc xrx xxo xxx