-er a-a a-b a-c a-t aaa aab aac aad aae aao aar aat aau ab- aba abb abc abd abe abo abr abt abu ac- aca acb acc acd ace aco acr act acu ad- ada adb adc add ade ado adr adt adu aea aeb aec aed aee aeo aer aet aeu aoa aob aoc aod aoe aoo aor aot aou ar- ara arb arc ard are aro arr art aru at- ata atb atc atd ate ato atr att atu au- aua aub auc aud aue auo aur aut b-u baa bab bac bad bae bao bar bat bau bba bbb bbc bbd bbe bbo bbr bbt bbu bca bcb bcc bcd bce bco bcr bct bcu bda bdb bdc bdd bde bdo bdr bdt bdu be- bea beb bec bed bee beo ber bet beu boa bob boc bod boe boo bor bot bou bra brb brd bre bro brr brt bru bta btb btc btd bte bto btr btt btu bua bub buc bud bue buo bur but buu c-- caa cab cac cad cae cao car cat cau cba cbb cbc cbd cbe cbo cbr cbt cbu cca ccb ccc ccd cce cco ccr cct ccu cda cdb cdc cdd cde cdo cdr cdt cdu ce- cea ceb cec ced cee ceo cer cet ceu co- coa cob coc cod coe coo cor cot cou cra crb crc crd cre cro crr crt cru cta ctb ctc ctd cte cto ctr ctt ctu cua cub cuc cud cue cuo cur cut cuu daa dab dac dad dae dao dar dat dau dba dbb dbc dbd dbe dbo dbr dbt dbu dca dcb dcc dcd dce dco dcr dct dcu dda ddb ddc ddd dde ddo ddr ddt ddu de- dea deb dec ded dee deo der det deu doa dob doc dod doe doo dor dot dou dra drb drc drd dre dro drr drt dru dta dtb dtc dtd dte dto dtr dtt dtu dua dub duc dud due duo dur dut eaa eab eac ead eae eao ear eat eau eba ebb ebc ebd ebe ebo ebr ebt ebu ec- eca ecb ecc ecd ece eco ecr ect ecu ed- eda edb edc edd ede edo edr edt edu eea eeb eec eed eee eeo eer eet eo- eoa eob eoc eod eoe eoo eor eot eou era erb erc erd ere ero err ert eru eta etb etc etd ete eto etr ett etu eu- eua eub euc eud eue eur eut oaa oab oac oad oae oao oar oat oau ob- oba obb obc obd obe obo obr obt obu oc- oca ocb occ ocd oco ocr oct ocu oda odb odc odd ode odo odr odt odu oea oeb oec oed oee oeo oer oet oo- ooa oob ooc ood ooo oor oot or- ora orb orc ord ore oro orr ort oru ot- ota otb otc otd ote oto otr ott otu ou- oua ouc oud oue ouo our out ra- raa rab rac rad rae rao rar rat rau rba rbb rbc rbd rbe rbo rbr rbt rbu rca rcb rcc rcd rce rco rcr rct rcu rda rdb rdc rdd rde rdo rdr rdt rdu re- rea reb rec red ree reo rer ret reu roa rob roc rod roe roo ror rot rou rra rrb rrc rrd rrr rrt rru rta rtb rtc rtd rte rto rtr rtt rtu rua rub ruc rud rue ruo rur rut ruu taa tab tac tad tae tao tar tat tau tba tbb tbc tbd tbe tbo tbr tbt tbu tca tcb tcc tcd tce tco tcr tct tcu tda tdb tdc tdd tde tdo tdr tdt tdu te- tea teb tec ted tee teo ter tet teu to- toa tob toc tod toe too tor tot tou tra trb trc trd tre tro trr trt tru tta ttb ttc ttd tte tto ttr ttt ttu tua tub tuc tud tue tuo tur tut tuu ua- uaa uab uac uad uae uao uar uat uau uba ubb ubc ube ubo ubr ubt ubu uca ucb ucc ucd uce uco ucr uct ucu uda udb udc udd ude udo udr udt udu uea ueb uec ued uee uer uet uoa uob uoc uod uoe uoo uor uot ur- ura urb urc urd ure uro urr urt uru uta utb utc utd ute uto utr utt utu uua uuc uue uur uut uuu

a-be a-do aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aaco aacr aact aacu aada aadc aade aadt aadu aaea aaec aaoe aaoo aara aarc aard aare aaro aart aaru aata aatc aatt abaa abab abac abad abae abar abat abau abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo abdu abec abed abee aber abet aboa abob abod aboo abor abot abou abra abrc abro abta abtu abua abud abue abut ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acco acct accu acda acdb acdc acde acdt ace- acea acec aced acer acet acoa acod acoe acor acot acou acr- acra acrc acre acro acrr acta actc acte acto actt actu acu- acue acuo acur acut adaa adab adac adad adae adao adar adat adba adbc adcc adda addc addd adde addo addr addu adea adeb adee adeo ader adet adob adoc adod adoe adoo ador adot adra adre adro adta adua adub adue adur aeac aecb aect aede aedt aeer aer- aera aerc aerd aero aeta aetc aeto aetr aett aoba aoca aoce aoeu aora aorb aort aotc aotd aout arab arac arad arae arar arat arau arba arbe arc- arca arce arco arct arda ardc arde ardo ardu area arec ared aree areo aret areu aroa arob arod aroe aroo aror arr- arra arrc arre arro arrr arrt arru arta artc arte arto artr arua arub arud arue arut at-t ataa atab atac atad atae atar atat