-er a-a a-b a-i aaa aab aad aae aai aao aar aas aau ab- aba abb abd abe abi abo abr abs abu ad- ada adb add ade adi ado adr ads adu aea aeb aed aee aei aeo aer aes aeu ai- aia aib aid aie aii aio air ais aiu aoa aob aod aoe aoi aoo aor aos aou ar- ara arb ard are ari aro arr ars aru as- asa asb asd ase asi aso asr ass asu au- aua aub aud aue aui auo aur aus b-u baa bab bad bae bai bao bar bas bau bba bbb bbd bbe bbi bbo bbr bbs bbu bda bdb bdd bde bdi bdo bdr bds bdu be- bea beb bed bee bei beo ber bes beu bi- bia bib bid bie bii bio bir bis biu boa bob bod boe boi boo bor bos bou bra brb brd bre bri bro brr brs bru bsa bsb bsd bse bsi bso bsr bss bsu bua bub bud bue bui buo bur bus buu daa dab dad dae dai dao dar das dau dba dbb dbd dbe dbi dbo dbr dbs dbu dda ddb ddd dde ddi ddo ddr dds ddu de- dea deb ded dee dei deo der des deu di- dia dib did die dii dio dir dis diu doa dob dod doe doi doo dor dos dou dra drb drd dre dri dro drr drs dru dsa dsb dsd dse dsi dso dsr dss dsu dua dub dud due dui duo dur dus eaa eab ead eae eai eao ear eas eau eba ebb ebd ebe ebi ebo ebr ebs ebu ed- eda edb edd ede edi edo edr eds edu eea eeb eed eee eeo eer ees eia eib eid eie eii eio eir eis eiu eo- eoa eob eod eoe eoi eoo eor eos eou era erb erd ere eri ero err ers eru es- esa esb esd ese esi eso esr ess esu eu- eua eub eud eue eui eur eus i-d ia- iaa iab iad iae iai iao iar ias iau iba ibb ibd ibe ibi ibo ibr ibs ibu ida idb idd ide idi ido idr ids idu ie- iea ied iee iei ier ies iia iib iid iie iii iio iir iis iiu io- ioa iob iod ioe ioi ioo ior ios iou ir- ira irb ird ire iri iro irr irs iru is- isa isb isd ise isi iso isr iss isu iu- iua iub iud iue iui iur ius o-i oaa oab oad oae oai oao oar oas oau ob- oba obb obd obe obi obo obr obs obu oda odb odd ode odi odo odr ods odu oea oeb oed oee oei oeo oer oes oia oib oid oie oii oio oir ois oiu oo- ooa oob ood ooi ooo oor oos or- ora orb ord ore ori oro orr ors oru os- osa osb osd ose osi oso osr oss osu ou- oua oud oue oui ouo our ous ra- raa rab rad rae rai rao rar ras rau rba rbb rbd rbe rbi rbo rbr rbs rbu rda rdb rdd rde rdi rdo rdr rds rdu re- rea reb red ree rei reo rer res reu ria rib rid rie rii rio rir ris roa rob rod roe roi roo ror ros rou rra rrb rrd rri rrr rrs rru rsa rsb rsd rse rsi rso rsr rss rsu rua rub rud rue rui ruo rur rus ruu saa sab sad sae sai sao sar sas sau sba sbb sbd sbe sbi sbo sbr sbs sbu sda sdb sdd sde sdi sdo sdr sds sdu se- sea seb sed see sei seo ser ses seu sia sib sid sie sii sio sir sis siu soa sob sod soe soi soo sor sos sou sr- sra srb srd sre sri sro srr srs ss- ssa ssb ssd sse ssi sso ssr sss ssu sua sub sud sue sui suo sur sus suu ua- uaa uab uad uae uai uao uar uas uau uba ubb ube ubi ubo ubr ubs ubu uda udb udd ude udi udo udr uds udu uea ueb ued uee uei uer ues uia uib uid uie uii uio uir uis uiu uoa uob uod uoe uoo uor uos ur- ura urb urd ure uri uro urr urs uru usa usb usd use usi uso usr uss usu uua uue uur uus uuu