-er a-a a-b aaa aab aae aaj aao aar aas aau ab- aba abb abe abj abo abr abs abu aea aeb aee aej aeo aer aes aeu aja ajb aje ajj ajo ajr ajs aju aoa aob aoe aoj aoo aor aos aou ar- ara arb are arj aro arr ars aru as- asa asb ase asj aso asr ass asu au- aua aub aue auj auo aur aus b-u baa bab bae baj bao bar bas bau bba bbb bbe bbo bbr bbs bbu be- bea beb bee beo ber bes beu bja bjj bjr bjs bju boa bob boe boj boo bor bos bou bra brb bre brj bro brr brs bru bsa bsb bse bsj bso bsr bss bsu bua bub bue buj buo bur bus buu eaa eab eae eaj eao ear eas eau eba ebb ebe ebj ebo ebr ebs ebu eea eeb eee eeo eer ees eja ejo eju eo- eoa eob eoe eoo eor eos eou era erb ere ero err ers eru es- esa esb ese eso esr ess esu eu- eua eub eue euj eur eus jaa jab jae jaj jao jar jas jau jba jbj jbo jbr jbs jbu jea jeb jee jej jeo jer jes jeu jja jjb jjj jjr jjs jju joa job joe joj joo jor jos jou jra jrb jro jrr jrs jsa jsb jse jsj jso jsr jss jsu jub jue juo jur jus oaa oab oae oaj oao oar oas oau ob- oba obb obe obj obo obr obs obu oea oeb oee oeo oer oes oja ojb oje ojo ojs oju oo- ooa oob ooo oor oos or- ora orb ore oro orr ors oru os- osa osb ose osj oso osr oss osu ou- oua oue ouo our ous ra- raa rab rae raj rao rar ras rau rba rbb rbe rbo rbr rbs rbu re- rea reb ree reo rer res reu rja rjr roa rob roe roj roo ror ros rou rra rrb rrr rrs rru rsa rsb rse rsj rso rsr rss rsu rua rub rue ruo rur rus ruu saa sab sae saj sao sar sas sau sba sbb sbe sbj sbo sbr sbs sbu se- sea seb see sej seo ser ses seu sja sjb sje sjj sjr sjs sju soa sob soe soj soo sor sos sou sr- sra srb sre srj sro srr srs ss- ssa ssb sse ssj sso ssr sss ssu sua sub sue suo sur sus suu ua- uaa uab uae uaj uao uar uas uau uba ubb ube ubo ubr ubs ubu uea ueb uee uer ues ujo ujs uoa uob uoe uoj uoo uor uos ur- ura urb ure uro urr urs uru usa usb use usj uso usr uss usu uua uue uur uus uuu