-er a-a a-b a-i a-t aaa aab aae aai aar aas aat aau aav ab- aba abb abe abi abr abs abt abu abv aea aeb aee aei aer aes aet aeu aev ai- aia aib aie aii air ais ait aiu aiv ar- ara arb are ari arr ars art aru arv as- asa asb ase asi asr ass ast asu asv at- ata atb ate ati atr ats att atu atv au- aua aub aue aui aur aus aut auv av- ava avb ave avi avr avs avt avu b-u baa bab bae bai bar bas bat bau bav bba bbb bbe bbi bbr bbs bbt bbu be- bea beb bee bei ber bes bet beu bev bi- bia bib bie bii bir bis bit biu biv bra brb bre bri brr brs brt bru brv bsa bsb bse bsi bsr bss bst bsu bsv bta btb bte bti btr bts btt btu btv bua bub bue bui bur bus but buu bva bvb bve bvi bvr bvs bvt bvu bvv eaa eab eae eai ear eas eat eau eav eba ebb ebe ebi ebr ebs ebt ebu ebv eea eeb eee eer ees eet eev eia eib eie eii eir eis eit eiu eiv era erb ere eri err ers ert eru erv es- esa esb ese esi esr ess est esu esv eta etb ete eti etr ets ett etu etv eu- eua eub eue eui eur eus eut euv eva evb eve evi evr evs evt evv i-v ia- iaa iab iae iai iar ias iat iau iav iba ibb ibe ibi ibr ibs ibt ibu ibv ie- iea iee iei ier ies iet iev iia iib iie iii iir iis iit iiu ir- ira irb ire iri irr irs irt iru irv is- isa isb ise isi isr iss ist isu isv ita itb ite iti its itt itu itv iu- iua iub iue iui iur ius iut iva ivb ive ivi ivr ivs ivt ivu ivv ra- raa rab rae rai rar ras rat rau rav rba rbb rbe rbi rbr rbs rbt rbu re- rea reb ree rei rer res ret reu rev ria rib rie rii rir ris rit riv rra rrb rri rrr rrs rrt rru rsa rsb rse rsi rsr rss rst rsu rsv rta rtb rte rti rtr rts rtt rtu rtv rua rub rue rui rur rus rut ruu ruv rva rvb rve rvi rvr rvs rvt rvu rvv saa sab sae sai sar sas sat sau sav sba sbb sbe sbi sbr sbs sbt sbu sbv se- sea seb see sei ser ses set seu sev sia sib sie sii sir sis sit siu siv sr- sra srb sre sri srr srs srt srv ss- ssa ssb sse ssi ssr sss sst ssu ssv sta stb ste sti str sts stt stu stv sua sub sue sui sur sus sut suu suv sva svb sve svi svr svs svt svu svv taa tab tae tai tar tas tat tau tav tba tbb tbe tbi tbr tbs tbt tbu tbv te- tea teb tee tei ter tes tet teu tev tia tib tie tii tir tis tit tiu tiv tra trb tre tri trr trs trt tru trv tsa tsb tse tsi tsr tss tst tsu tsv tta ttb tte tti ttr tts ttt ttu ttv tua tub tue tui tur tus tut tuu tuv tva tvb tve tvi tvr tvs tvt tvu ua- uaa uab uae uai uar uas uat uau uav uba ubb ube ubi ubr ubs ubt ubu ubv uea ueb uee uei uer ues uet uia uib uie uii uir uis uit uiu ur- ura urb ure uri urr urs urt uru usa usb use usi usr uss ust usu usv uta utb ute uti utr uts utt utu utv uua uue uur uus uut uuu uva uvb uve uvs uvu uvv v-a v-e vaa vab vae vai var vas vat vau vav vba vbi vbr vbs vbv vea veb vee vei ver ves vet veu vi- via vib vie vii vir vis vit viu viv vra vrb vre vri vrr vrs vrt vru vsa vsb vse vsi vsr vss vst vsu vsv vta vtb vte vti vtr vts vtt vtu vtv vue vur vus vut vuv vva vvb vvi vvr vvs vvt vvv