-er a-a a-b aaa aab aae aah aak aam aao aar ab- aba abb abe abh abk abm abo abr aea aeb aee aeh aek aem aeo aer aha ahb ahe ahh ahk ahm aho ahr aka akb ake akh akk akm ako akr ama amb ame amh amk amm amo amr aoa aob aoe aoh aok aom aoo aor ar- ara arb are arh ark arm aro arr baa bab bae bah bak bam bao bar bba bbb bbe bbh bbk bbm bbo bbr be- bea beb bee beh bek bem beo ber bha bhb bhe bhh bhk bhm bho bhr bka bkb bke bkk bkm bko bkr bma bmb bme bmh bmk bmm bmo bmr boa bob boe boh bok bom boo bor bra brb bre brh brk brm bro brr eaa eab eae eah eak eam eao ear eba ebb ebe ebh ebk ebm ebo ebr eea eeb eee eek eem eeo eer eha ehb ehe ehh ehm eho ehr eka ekb eke ekh eko ekr em- ema emb eme emh emk emm emo emr eo- eoa eob eoe eoh eok eom eoo eor era erb ere erh erk erm ero err haa hab hae hah hak ham hao har hba hbb hbe hbh hbk hbm hbo hbr he- hea heb hee heh hek hem heo her hha hhb hhe hhh hhk hhm hho hhr hka hkb hkh hkk hkm hko hkr hma hmb hme hmh hmk hmm hmo hmr hoa hob hoe hoh hok hom hoo hor hr- hra hrb hre hrh hrk hrm hro hrr ka- kaa kab kae kah kak kam kao kar kba kbb kbe kbh kbk kbm kbo kbr ke- kea keb kee keh kek kem keo ker kha khe khh khk khm kho khr kkb kke kkh kkk kkm kkr kma kmb kme kmh kmk kmm kmo koa kob koe koh kok kom koo kor kra krk kro krr m-o m-r maa mab mae mah mak mam mao mar mba mbb mbe mbh mbk mbm mbo mbr mea meb mee meh mek mem meo mer mha mhh mhk mhm mho mhr mka mkb mke mkh mkk mkm mko mkr mma mmb mme mmh mmk mmm mmo mmr moa mob moe moh mok mom moo mor mra mrb mre mrh mrk mrm mro mrr oaa oab oae oah oak oam oao oar ob- oba obb obe obh obk obm obo obr oea oeb oee oeh oem oeo oer oha ohe ohh ohm oho ohr oka okb oke okk oko okr om- oma omb ome omh omm omo omr oo- ooa oob ooh ook oom ooo oor or- ora orb ore orh ork orm oro orr ra- raa rab rae rah rak ram rao rar rba rbb rbe rbh rbk rbm rbo rbr re- rea reb ree reh rek rem reo rer rh- rha rhb rhe rhh rhm rho rhr rkb rke rkk rkm rko rma rmb rme rmh rmm rmo rmr roa rob roe roh rok rom roo ror rra rrb rrh rrk rrm rrr