-er a-a a-b aaa aab aae aah aam aao aar ab- aba abb abe abh abm abo abr aea aeb aee aeh aem aeo aer aha ahb ahe ahh ahm aho ahr ama amb ame amh amm amo amr aoa aob aoe aoh aom aoo aor ar- ara arb are arh arm aro arr baa bab bae bah bam bao bar bba bbb bbe bbh bbm bbo bbr be- bea beb bee beh bem beo ber bha bhb bhe bhh bhm bho bhr bma bmb bme bmh bmm bmo bmr boa bob boe boh bom boo bor bra brb bre brh brm bro brr eaa eab eae eah eam eao ear eba ebb ebe ebh ebm ebo ebr eea eeb eee eem eeo eer eha ehb ehe ehh ehm eho ehr em- ema emb eme emh emm emo emr eo- eoa eob eoe eoh eom eoo eor era erb ere erh erm ero err haa hab hae hah ham hao har hba hbb hbe hbh hbm hbo hbr he- hea heb hee heh hem heo her hha hhb hhe hhh hhm hho hhr hma hmb hme hmh hmm hmo hmr hoa hob hoe hoh hom hoo hor hr- hra hrb hre hrh hrm hro hrr m-o m-r maa mab mae mah mam mao mar mba mbb mbe mbh mbm mbo mbr mea meb mee meh mem meo mer mha mhh mhm mho mhr mma mmb mme mmh mmm mmo mmr moa mob moe moh mom moo mor mra mrb mre mrh mrm mro mrr oaa oab oae oah oam oao oar ob- oba obb obe obh obm obo obr oea oeb oee oeh oem oeo oer oha ohe ohh ohm oho ohr om- oma omb ome omh omm omo omr oo- ooa oob ooh oom ooo oor or- ora orb ore orh orm oro orr ra- raa rab rae rah ram rao rar rba rbb rbe rbh rbm rbo rbr re- rea reb ree reh rem reo rer rh- rha rhb rhe rhh rhm rho rhr rma rmb rme rmh rmm rmo rmr roa rob roe roh rom roo ror rra rrb rrh rrm rrr