-er a-a a-b a-i aaa aab aad aae aaf aai aao aar aas aau ab- aba abb abd abe abf abi abo abr abs abu ad- ada adb add ade adf adi ado adr ads adu aea aeb aed aee aef aei aeo aer aes aeu af- afa afb afd afe aff afi afo afr afs afu ai- aia aib aid aie aif aii aio air ais aiu aoa aob aod aoe aof aoi aoo aor aos aou ar- ara arb ard are arf ari aro arr ars aru as- asa asb asd ase asf asi aso asr ass asu au- aua aub aud aue auf aui auo aur aus b-u baa bab bad bae baf bai bao bar bas bau bba bbb bbd bbe bbf bbi bbo bbr bbs bbu bda bdb bdd bde bdf bdi bdo bdr bds bdu be- bea beb bed bee bef bei beo ber bes beu bfa bfb bfd bfe bff bfi bfo bfr bfs bfu bi- bia bib bid bie bif bii bio bir bis biu boa bob bod boe bof boi boo bor bos bou bra brb brd bre brf bri bro brr brs bru bsa bsb bsd bse bsf bsi bso bsr bss bsu bua bub bud bue buf bui buo bur bus buu daa dab dad dae daf dai dao dar das dau dba dbb dbd dbe dbf dbi dbo dbr dbs dbu dda ddb ddd dde ddf ddi ddo ddr dds ddu de- dea deb ded dee def dei deo der des deu dfa dfb dfd dfe dff dfi dfo dfr dfs dfu di- dia dib did die dif dii dio dir dis diu doa dob dod doe dof doi doo dor dos dou dra drb drd dre dri dro drr drs dru dsa dsb dsd dse dsf dsi dso dsr dss dsu dua dub dud due duf dui duo dur dus eaa eab ead eae eaf eai eao ear eas eau eba ebb ebd ebe ebf ebi ebo ebr ebs ebu ed- eda edb edd ede edf edi edo edr eds edu eea eeb eed eee eef eeo eer ees ef- efa efb efd efe eff efi efo efr efs eia eib eid eie eif eii eio eir eis eiu eo- eoa eob eod eoe eof eoi eoo eor eos eou era erb erd ere erf eri ero err ers eru es- esa esb esd ese esf esi eso esr ess esu eu- eua eub eud eue euf eui eur eus faa fab fad fae faf fai fao far fas fau fba fbb fbd fbe fbf fbi fbo fbr fbs fbu fda fdb fdd fde fdf fdi fdo fdr fds fdu fea feb fed fee fef fei feo fer fes feu ffa ffd ffe fff ffi ffo ffr ffs ffu fia fib fid fie fif fii fir fis fiu foa fob foe fof foi foo for fos fou fra frb frd fre frf fri fro frr frs fru fsa fsb fsd fse fsf fsi fso fsr fss fsu fua fub fud fue fuf fui fuo fur fus fuu i-d i-f ia- iaa iab iad iae iaf iai iao iar ias iau iba ibb ibd ibe ibf ibi ibo ibr ibs ibu ida idb idd ide idf idi ido idr ids idu ie- iea ied iee ief iei ier ies ifa ifb ifd ife iff ifi ifo ifr ifs ifu iia iib iid iie iif iii iio iir iis iiu io- ioa iob iod ioe iof ioi ioo ior ios iou ir- ira irb ird ire irf iri iro irr irs iru is- isa isb isd ise isf isi iso isr iss isu iu- iua iub iud iue iui iur ius o-i oaa oab oad oae oaf oai oao oar oas oau ob- oba obb obd obe obf obi obo obr obs obu oda odb odd ode odf odi odo odr ods odu oea oeb oed oee oef oei oeo oer oes of- ofa ofb ofd ofe off ofi ofo ofr ofs ofu oia oib oid oie oif oii oio oir ois oiu oo- ooa oob ood oof ooi ooo oor oos or- ora orb ord ore orf ori oro orr ors oru os- osa osb osd ose osf osi oso osr oss osu ou- oua oud oue ouf oui ouo our ous ra- raa rab rad rae raf rai rao rar ras rau rba rbb rbd rbe rbf rbi rbo rbr rbs rbu rda rdb rdd rde rdf rdi rdo rdr rds rdu re- rea reb red ree ref rei reo rer res reu rfa rfb rfd rfe rff rfi rfo rfr rfs rfu ria rib rid rie rif rii rio rir ris roa rob rod roe rof roi roo ror ros rou rra rrb rrd rrf rri rrr rrs rru rsa rsb rsd rse rsf rsi rso rsr rss rsu rua rub rud rue ruf rui ruo rur rus ruu saa sab sad sae saf sai sao sar sas sau sba sbb sbd sbe sbf sbi sbo sbr sbs sbu sda sdb sdd sde sdf sdi sdo sdr sds sdu se- sea seb sed see sef sei seo ser ses seu sfa sfb sfd sfe sff sfi sfo sfr sfs sfu sia sib sid sie sif sii sio sir sis siu soa sob sod soe sof soi soo sor sos sou sr- sra srb srd sre srf sri sro srr srs ss- ssa ssb ssd sse ssf ssi sso ssr sss ssu sua sub sud sue suf sui suo sur sus suu ua- uaa uab uad uae uaf uai uao uar uas uau uba ubb ube ubf ubi ubo ubr ubs ubu uda udb udd ude udf udi udo udr uds udu uea ueb ued uee uef uei uer ues ufa ufd ufe uff ufi ufo ufr ufs ufu uia uib uid uie uif uii uio uir uis uiu uoa uob uod uoe uoo uor uos ur- ura urb urd ure urf uri uro urr urs uru usa usb usd use usf usi uso usr uss usu