-er a-a a-b a-c a-t aaa aab aac aad aae aar aat aau ab- aba abb abc abd abe abr abt abu ac- aca acb acc acd ace acr act acu ad- ada adb adc add ade adr adt adu aea aeb aec aed aee aer aet aeu ar- ara arb arc ard are arr art aru at- ata atb atc atd ate atr att atu au- aua aub auc aud aue aur aut b-u baa bab bac bad bae bar bat bau bba bbb bbc bbd bbe bbr bbt bbu bca bcb bcc bcd bce bcr bct bcu bda bdb bdc bdd bde bdr bdt bdu be- bea beb bec bed bee ber bet beu bra brb brd bre brr brt bru bta btb btc btd bte btr btt btu bua bub buc bud bue bur but buu c-- caa cab cac cad cae car cat cau cba cbb cbc cbd cbe cbr cbt cbu cca ccb ccc ccd cce ccr cct ccu cda cdb cdc cdd cde cdr cdt cdu ce- cea ceb cec ced cee cer cet ceu cra crb crc crd cre crr crt cru cta ctb ctc ctd cte ctr ctt ctu cua cub cuc cud cue cur cut cuu daa dab dac dad dae dar dat dau dba dbb dbc dbd dbe dbr dbt dbu dca dcb dcc dcd dce dcr dct dcu dda ddb ddc ddd dde ddr ddt ddu de- dea deb dec ded dee der det deu dra drb drc drd dre drr drt dru dta dtb dtc dtd dte dtr dtt dtu dua dub duc dud due dur dut eaa eab eac ead eae ear eat eau eba ebb ebc ebd ebe ebr ebt ebu ec- eca ecb ecc ecd ece ecr ect ecu ed- eda edb edc edd ede edr edt edu eea eeb eec eed eee eer eet era erb erc erd ere err ert eru eta etb etc etd ete etr ett etu eu- eua eub euc eud eue eur eut ra- raa rab rac rad rae rar rat rau rba rbb rbc rbd rbe rbr rbt rbu rca rcb rcc rcd rce rcr rct rcu rda rdb rdc rdd rde rdr rdt rdu re- rea reb rec red ree rer ret reu rra rrb rrc rrd rrr rrt rru rta rtb rtc rtd rte rtr rtt rtu rua rub ruc rud rue rur rut ruu taa tab tac tad tae tar tat tau tba tbb tbc tbd tbe tbr tbt tbu tca tcb tcc tcd tce tcr tct tcu tda tdb tdc tdd tde tdr tdt tdu te- tea teb tec ted tee ter tet teu tra trb trc trd tre trr trt tru tta ttb ttc ttd tte ttr ttt ttu tua tub tuc tud tue tur tut tuu ua- uaa uab uac uad uae uar uat uau uba ubb ubc ube ubr ubt ubu uca ucb ucc ucd uce ucr uct ucu uda udb udc udd ude udr udt udu uea ueb uec ued uee uer uet ur- ura urb urc urd ure urr urt uru uta utb utc utd ute utr utt utu uua uuc uue uur uut uuu

a-be aaaa aaab aaac aaad aaae aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aace aacr aact aacu aada aadc aade aadt aadu aaea aaec aara aarc aard aare aart aaru aata aatc aatt abaa abab abac abad abae abar abat abau abb- abba abbb abbe abbr abbt abca abcb abcc abcd abcr abct abda abdu abec abed abee aber abet abra abrc abta abtu abua abud abue abut ac-t acaa acab acac acad acae acar acat acba acca accc accd acce acct accu acda acdb acdc acde acdt ace- acea acec aced acer acet acr- acra acrc acre acrr acta actc acte actt actu acu- acue acur acut adaa adab adac adad adae adar adat adba adbc adcc adda addc addd adde addr addu adea adeb adee ader adet adra adre adta adua adub adue adur aeac aecb aect aede aedt aeer aer- aera aerc aerd aeta aetc aetr aett arab arac arad arae arar arat arau arba arbe arc- arca arce arct arda ardc arde ardu area arec ared aree aret areu arr- arra arrc arre arrr arrt arru arta artc arte artr arua arub arud arue arut at-t ataa atab atac atad atae atar atat atca atcc atcr atdt atea atec ated atee ater atra atrc atre atru atta atte attr attu atua atub atuc atur auaa aube auca auce auct audc aude auer aur- aura aurd aure aut- aute baaa baad baar baat baba babb babe babr babu bac- baca bacc bace bact bada badb badd bade badr badu baed baer bar- bara barb barc bard bare barr bart baru bata batc bate batt batu bau- baud baur bbad bbau bbbb bbdd bbeb bbet bbrc bcaa bcar bcat bcbc bcca bccc bcda bcde bcec bcer bcet bcra bcru bctc bcuc bd-r bdbc bddc bead bear beat beau beba bebb bebe beca becu beda bede bedu beeb beed beer beet bera berc berd bere berr bert beru beta betc bete bett betu beur brab brac brad brae brat brau brca brcb brce brda brdt brea breb brec bred bree brer bret brrr brtc bruc brud brue brut btaa btcc btdt btec btrc btrt bttb buad buar buat buba bubb bube bubu buca bucc buce bucu buda budb budd bude budu buea buer bueu bur- bura burb burd bure burr burt buru but- buta bute butt c-cd caaa caab caac caat caba cabe cabu cac- caca cacc cace cacr cada cadc cadd cade cadr cadu caec caer caeu cara carb carc card care carr cart cat- cata catb catc catd cate catt catu cauc caut cbac cbar cbat cbbc cbca cbcc cbce cbcr cbct cbcu cbdb cbdc cbea cbec cbee cber cbet cbrd cbre cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc cccu ccdc ccdr cced ccee ccra ccrc ccre ccrt cctb cctc cctt