-er -ey a-a a-b aaa aab aae aam aao aar aay ab- aba abb abe abm abo abr aby aea aeb aee aem aeo aer aey ama amb ame amm amo amr amy aoa aob aoe aom aoo aor ar- ara arb are arm aro arr ary ay- aya aye ayo ayr baa bab bae bam bao bar bay bba bbb bbe bbm bbo bbr bby be- bea beb bee bem beo ber bey bma bmb bme bmm bmo bmr boa bob boe bom boo bor boy bra brb bre brm bro brr bry by- bya bye bym byo byr eaa eab eae eam eao ear eba ebb ebe ebm ebo ebr eby eea eeb eee eem eeo eer eey em- ema emb eme emm emo emr eo- eoa eob eoe eom eoo eor era erb ere erm ero err ery eya eye eym eyo eyr m-o m-r maa mab mae mam mao mar may mba mbb mbe mbm mbo mbr mea meb mee mem meo mer mey mma mmb mme mmm mmo mmr moa mob moe mom moo mor moy mra mrb mre mrm mro mrr mry my- mya myb mye mym myo myr oaa oab oae oam oao oar ob- oba obb obe obm obo obr oby oea oeb oee oem oeo oer oey om- oma omb ome omm omo omr omy oo- ooa oob oom ooo oor or- ora orb ore orm oro orr ory oya oye oyo ra- raa rab rae ram rao rar ray rba rbb rbe rbm rbo rbr re- rea reb ree rem reo rer rey rma rmb rme rmm rmo rmr roa rob roe rom roo ror roy rra rrb rrm rrr ry- rya rye rym ryo ryr ryy yaa yab yae yam yao yar yay ybe ybm ybr yby yea yeb yee yem yeo yer yey yma yme ymm ymo yob yoe yom yoo yor yoy yra yre yro yyb yye yyy