-er a-a a-b aaa aab aad aae aah aam aao aar ab- aba abb abd abe abh abm abo abr ad- ada adb add ade adh adm ado adr aea aeb aed aee aeh aem aeo aer aha ahb ahd ahe ahh ahm aho ahr ama amb amd ame amh amm amo amr aoa aob aod aoe aoh aom aoo aor ar- ara arb ard are arh arm aro arr baa bab bad bae bah bam bao bar bba bbb bbd bbe bbh bbm bbo bbr bda bdb bdd bde bdh bdm bdo bdr be- bea beb bed bee beh bem beo ber bha bhb bhd bhe bhh bhm bho bhr bma bmb bmd bme bmh bmm bmo bmr boa bob bod boe boh bom boo bor bra brb brd bre brh brm bro brr daa dab dad dae dah dam dao dar dba dbb dbd dbe dbh dbm dbo dbr dda ddb ddd dde ddh ddm ddo ddr de- dea deb ded dee deh dem deo der dh- dha dhb dhd dhe dhh dhm dho dhr dma dmb dmd dme dmh dmm dmo dmr doa dob dod doe doh dom doo dor dra drb drd dre drm dro drr eaa eab ead eae eah eam eao ear eba ebb ebd ebe ebh ebm ebo ebr ed- eda edb edd ede edh edm edo edr eea eeb eed eee eem eeo eer eha ehb ehd ehe ehh ehm eho ehr em- ema emb emd eme emh emm emo emr eo- eoa eob eod eoe eoh eom eoo eor era erb erd ere erh erm ero err haa hab had hae hah ham hao har hba hbb hbd hbe hbh hbm hbo hbr hda hdb hdd hde hdh hdm hdo hdr he- hea heb hed hee heh hem heo her hha hhb hhd hhe hhh hhm hho hhr hma hmb hmd hme hmh hmm hmo hmr hoa hob hod hoe hoh hom hoo hor hr- hra hrb hrd hre hrh hrm hro hrr m-o m-r maa mab mad mae mah mam mao mar mba mbb mbd mbe mbh mbm mbo mbr mda mdb mdd mde mdh mdm mdo mdr mea meb med mee meh mem meo mer mha mhd mhh mhm mho mhr mma mmb mmd mme mmh mmm mmo mmr moa mob mod moe moh mom moo mor mra mrb mrd mre mrh mrm mro mrr oaa oab oad oae oah oam oao oar ob- oba obb obd obe obh obm obo obr oda odb odd ode odh odm odo odr oea oeb oed oee oeh oem oeo oer oha ohd ohe ohh ohm oho ohr om- oma omb omd ome omh omm omo omr oo- ooa oob ood ooh oom ooo oor or- ora orb ord ore orh orm oro orr ra- raa rab rad rae rah ram rao rar rba rbb rbd rbe rbh rbm rbo rbr rda rdb rdd rde rdh rdm rdo rdr re- rea reb red ree reh rem reo rer rh- rha rhb rhd rhe rhh rhm rho rhr rma rmb rmd rme rmh rmm rmo rmr roa rob rod roe roh rom roo ror rra rrb rrd rrh rrm rrr