-er a-a a-b aaa aab aae aag aah aao aar aas aau ab- aba abb abe abg abh abo abr abs abu aea aeb aee aeg aeh aeo aer aes aeu ag- aga agb age agg agh ago agr ags agu aha ahb ahe ahg ahh aho ahr ahs ahu aoa aob aoe aog aoh aoo aor aos aou ar- ara arb are arg arh aro arr ars aru as- asa asb ase asg ash aso asr ass asu au- aua aub aue aug auh auo aur aus b-u baa bab bae bag bah bao bar bas bau bba bbb bbe bbg bbh bbo bbr bbs bbu be- bea beb bee beg beh beo ber bes beu bga bgb bge bgg bgh bgo bgr bgs bgu bha bhb bhe bhg bhh bho bhr bhs bhu boa bob boe bog boh boo bor bos bou bra brb bre brg brh bro brr brs bru bsa bsb bse bsg bsh bso bsr bss bsu bua bub bue bug buh buo bur bus buu eaa eab eae eag eah eao ear eas eau eba ebb ebe ebg ebh ebo ebr ebs ebu eea eeb eee eeg eeo eer ees ega egb ege egg egh ego egr egs egu eha ehb ehe ehg ehh eho ehr ehs ehu eo- eoa eob eoe eog eoh eoo eor eos eou era erb ere erg erh ero err ers eru es- esa esb ese esg esh eso esr ess esu eu- eua eub eue eug eur eus gaa gab gae gag gah gao gar gas gau gba gbe gbg gbh gbo gbr gbs gbu ge- gea geb gee geg geh geo ger ges geu gga ggb ggg ggh ggo ggr ggs ggu gha ghb ghe ghg ghh gho ghr ghs goa gob goe gog goh goo gor gos gou gra grb gre grg grh gro grr grs gru gsa gsb gse gsg gso gsr gss gsu gu- gua gub gue gug guo gur gus guu haa hab hae hag hah hao har has hau hba hbb hbe hbg hbh hbo hbr hbs hbu he- hea heb hee heg heh heo her hes heu hga hgb hge hgg hgh hgo hgr hgs hgu hha hhb hhe hhg hhh hho hhr hhs hhu hoa hob hoe hog hoh hoo hor hos hou hr- hra hrb hre hrg hrh hro hrr hrs hru hsa hsb hse hsg hsh hsr hss hsu hua hub hue hug huh huo hur hus huu oaa oab oae oag oah oao oar oas oau ob- oba obb obe obg obh obo obr obs obu oea oeb oee oeg oeh oeo oer oes oga oge ogg ogh ogo ogs oha ohe ohg ohh oho ohr ohs ohu oo- ooa oob oog ooh ooo oor oos or- ora orb ore org orh oro orr ors oru os- osa osb ose osg osh oso osr oss osu ou- oua oue ouh ouo our ous ra- raa rab rae rag rah rao rar ras rau rba rbb rbe rbg rbh rbo rbr rbs rbu re- rea reb ree reg reh reo rer res reu rga rgb rge rgg rgh rgo rgr rgs rh- rha rhb rhe rhg rhh rho rhr rhs rhu roa rob roe rog roh roo ror ros rou rra rrb rrg rrh rrr rrs rru rsa rsb rse rsg rsh rso rsr rss rsu rua rub rue rug ruh ruo rur rus ruu saa sab sae sag sah sao sar sas sau sba sbb sbe sbg sbh sbo sbr sbs sbu se- sea seb see seg seh seo ser ses seu sga sgb sge sgg sgh sgo sgr sgs sgu sh- sha shb she shg shh sho shr shs shu soa sob soe sog soh soo sor sos sou sr- sra srb sre srg srh sro srr srs ss- ssa ssb sse ssg ssh sso ssr sss ssu sua sub sue sug suh suo sur sus suu ua- uaa uab uae uag uah uao uar uas uau uba ubb ube ubg ubh ubo ubr ubs ubu uea ueb uee ueg ueh uer ues uga ugb uge ugg ugh ugo ugr ugs ugu uha uhb uhe uhh uho uhr uhs uhu uoa uob uoe uog uoo uor uos ur- ura urb ure urg uro urr urs uru usa usb use usg ush uso usr uss usu uua uue uug uur uus uuu