a-a a-b a-i aaa aab aai aam aao aar aas aay ab- aba abb abi abm abo abr abs aby ai- aia aib aii aim aio air ais aiy ama amb ami amm amo amr ams amy aoa aob aoi aom aoo aor aos ar- ara arb ari arm aro arr ars ary as- asa asb asi asm aso asr ass asy ay- aya ayi ayo ayr ays baa bab bai bam bao bar bas bay bba bbb bbi bbm bbo bbr bbs bby bi- bia bib bii bim bio bir bis biy bma bmb bmi bmm bmo bmr bms boa bob boi bom boo bor bos boy bra brb bri brm bro brr brs bry bsa bsb bsi bsm bso bsr bss bsy by- bya byi bym byo byr bys ia- iaa iab iai iam iao iar ias iba ibb ibi ibm ibo ibr ibs iby iia iib iii iim iio iir iis im- ima imb imi imm imo ims imy io- ioa iob ioi iom ioo ior ios ir- ira irb iri irm iro irr irs iry is- isa isb isi ism iso isr iss isy iya iym iyo iyr iys iyy m-o m-r maa mab mai mam mao mar mas may mba mbb mbi mbm mbo mbr mbs mi- mia mib mii mim mio mir mis miy mma mmb mmi mmm mmo mmr mms moa mob moi mom moo mor mos moy mra mrb mri mrm mro mrr mrs mry msa msb msi msm mso msr mss msy my- mya myb mym myo myr mys o-i oaa oab oai oam oao oar oas ob- oba obb obi obm obo obr obs oby oia oib oii oim oio oir ois om- oma omb omi omm omo omr oms omy oo- ooa oob ooi oom ooo oor oos or- ora orb ori orm oro orr ors ory os- osa osb osi osm oso osr oss oya oyi oyo oys ra- raa rab rai ram rao rar ras ray rba rbb rbi rbm rbo rbr rbs ria rib rii rim rio rir ris riy rma rmb rmi rmm rmo rmr rms roa rob roi rom roo ror ros roy rra rrb rri rrm rrr rrs rsa rsb rsi rsm rso rsr rss ry- rya rym ryo ryr rys ryy saa sab sai sam sao sar sas say sba sbb sbi sbm sbo sbr sbs sby sia sib sii sim sio sir sis sma smb smi smm smo smr sms smy soa sob soi som soo sor sos soy sr- sra srb sri srm sro srr srs sry ss- ssa ssb ssi ssm sso ssr sss sy- sya syb syi sym syr sys yaa yab yai yam yao yar yas yay ybi ybm ybr ybs yby yii yim yio yir yis yma ymi ymm ymo yms yob yoi yom yoo yor yos yoy yra yro yrs ysa ysb ysi ysm yso ysr yss ysy yyb yys yyy