-er a-a a-b aaa aab aae aag aah aam aao aar ab- aba abb abe abg abh abm abo abr aea aeb aee aeg aeh aem aeo aer ag- aga agb age agg agh agm ago agr aha ahb ahe ahg ahh ahm aho ahr ama amb ame amg amh amm amo amr aoa aob aoe aog aoh aom aoo aor ar- ara arb are arg arh arm aro arr baa bab bae bag bah bam bao bar bba bbb bbe bbg bbh bbm bbo bbr be- bea beb bee beg beh bem beo ber bga bgb bge bgg bgh bgm bgo bgr bha bhb bhe bhg bhh bhm bho bhr bma bmb bme bmg bmh bmm bmo bmr boa bob boe bog boh bom boo bor bra brb bre brg brh brm bro brr eaa eab eae eag eah eam eao ear eba ebb ebe ebg ebh ebm ebo ebr eea eeb eee eeg eem eeo eer ega egb ege egg egh egm ego egr eha ehb ehe ehg ehh ehm eho ehr em- ema emb eme emg emh emm emo emr eo- eoa eob eoe eog eoh eom eoo eor era erb ere erg erh erm ero err gaa gab gae gag gah gam gao gar gba gbe gbg gbh gbm gbo gbr ge- gea geb gee geg geh gem geo ger gga ggb ggg ggh ggm ggo ggr gha ghb ghe ghg ghh gho ghr gma gmb gme gmg gmh gmm gmo gmr goa gob goe gog goh gom goo gor gra grb gre grg grh grm gro grr haa hab hae hag hah ham hao har hba hbb hbe hbg hbh hbm hbo hbr he- hea heb hee heg heh hem heo her hga hgb hge hgg hgh hgm hgo hgr hha hhb hhe hhg hhh hhm hho hhr hma hmb hme hmg hmh hmm hmo hmr hoa hob hoe hog hoh hom hoo hor hr- hra hrb hre hrg hrh hrm hro hrr m-o m-r maa mab mae mag mah mam mao mar mba mbb mbe mbg mbh mbm mbo mbr mea meb mee meg meh mem meo mer mga mgb mge mgh mgm mgo mgr mha mhg mhh mhm mho mhr mma mmb mme mmg mmh mmm mmo mmr moa mob moe mog moh mom moo mor mra mrb mre mrg mrh mrm mro mrr oaa oab oae oag oah oam oao oar ob- oba obb obe obg obh obm obo obr oea oeb oee oeg oeh oem oeo oer oga oge ogg ogh ogo oha ohe ohg ohh ohm oho ohr om- oma omb ome omg omh omm omo omr oo- ooa oob oog ooh oom ooo oor or- ora orb ore org orh orm oro orr ra- raa rab rae rag rah ram rao rar rba rbb rbe rbg rbh rbm rbo rbr re- rea reb ree reg reh rem reo rer rga rgb rge rgg rgh rgo rgr rh- rha rhb rhe rhg rhh rhm rho rhr rma rmb rme rmg rmh rmm rmo rmr roa rob roe rog roh rom roo ror rra rrb rrg rrh rrm rrr