a-a a-b a-i aaa aab aai aam aao aar aas aau ab- aba abb abi abm abo abr abs abu ai- aia aib aii aim aio air ais aiu ama amb ami amm amo amr ams amu aoa aob aoi aom aoo aor aos aou ar- ara arb ari arm aro arr ars aru as- asa asb asi asm aso asr ass asu au- aua aub aui aum auo aur aus b-u baa bab bai bam bao bar bas bau bba bbb bbi bbm bbo bbr bbs bbu bi- bia bib bii bim bio bir bis biu bma bmb bmi bmm bmo bmr bms bmu boa bob boi bom boo bor bos bou bra brb bri brm bro brr brs bru bsa bsb bsi bsm bso bsr bss bsu bua bub bui bum buo bur bus buu ia- iaa iab iai iam iao iar ias iau iba ibb ibi ibm ibo ibr ibs ibu iia iib iii iim iio iir iis iiu im- ima imb imi imm imo ims imu io- ioa iob ioi iom ioo ior ios iou ir- ira irb iri irm iro irr irs iru is- isa isb isi ism iso isr iss isu iu- iua iub iui ium iur ius m-o m-r maa mab mai mam mao mar mas mau mba mbb mbi mbm mbo mbr mbs mbu mi- mia mib mii mim mio mir mis miu mma mmb mmi mmm mmo mmr mms mmu moa mob moi mom moo mor mos mou mra mrb mri mrm mro mrr mrs mru msa msb msi msm mso msr mss msu mua mub mui mum mur mus muu o-i oaa oab oai oam oao oar oas oau ob- oba obb obi obm obo obr obs obu oia oib oii oim oio oir ois oiu om- oma omb omi omm omo omr oms omu oo- ooa oob ooi oom ooo oor oos or- ora orb ori orm oro orr ors oru os- osa osb osi osm oso osr oss osu ou- oua oui oum ouo our ous ra- raa rab rai ram rao rar ras rau rba rbb rbi rbm rbo rbr rbs rbu ria rib rii rim rio rir ris rma rmb rmi rmm rmo rmr rms roa rob roi rom roo ror ros rou rra rrb rri rrm rrr rrs rru rsa rsb rsi rsm rso rsr rss rsu rua rub rui rum ruo rur rus ruu saa sab sai sam sao sar sas sau sba sbb sbi sbm sbo sbr sbs sbu sia sib sii sim sio sir sis siu sma smb smi smm smo smr sms smu soa sob soi som soo sor sos sou sr- sra srb sri srm sro srr srs ss- ssa ssb ssi ssm sso ssr sss ssu sua sub sui sum suo sur sus suu ua- uaa uab uai uam uao uar uas uau uba ubb ubi ubo ubr ubs ubu uia uib uii uim uio uir uis uiu um- uma umb umi umm umo umr ums umu uoa uob uom uoo uor uos ur- ura urb uri urm uro urr urs uru usa usb usi usm uso usr uss usu uua uum uur uus uuu