a-a a-b a-c a-t aaa aab aac aad aao aar aat aau ab- aba abb abc abd abo abr abt abu ac- aca acb acc acd aco acr act acu ad- ada adb adc add ado adr adt adu aoa aob aoc aod aoo aor aot aou ar- ara arb arc ard aro arr art aru at- ata atb atc atd ato atr att atu au- aua aub auc aud auo aur aut b-u baa bab bac bad bao bar bat bau bba bbb bbc bbd bbo bbr bbt bbu bca bcb bcc bcd bco bcr bct bcu bda bdb bdc bdd bdo bdr bdt bdu boa bob boc bod boo bor bot bou bra brb brd bro brr brt bru bta btb btc btd bto btr btt btu bua bub buc bud buo bur but buu c-- caa cab cac cad cao car cat cau cba cbb cbc cbd cbo cbr cbt cbu cca ccb ccc ccd cco ccr cct ccu cda cdb cdc cdd cdo cdr cdt cdu co- coa cob coc cod coo cor cot cou cra crb crc crd cro crr crt cru cta ctb ctc ctd cto ctr ctt ctu cua cub cuc cud cuo cur cut cuu daa dab dac dad dao dar dat dau dba dbb dbc dbd dbo dbr dbt dbu dca dcb dcc dcd dco dcr dct dcu dda ddb ddc ddd ddo ddr ddt ddu doa dob doc dod doo dor dot dou dra drb drc drd dro drr drt dru dta dtb dtc dtd dto dtr dtt dtu dua dub duc dud duo dur dut oaa oab oac oad oao oar oat oau ob- oba obb obc obd obo obr obt obu oc- oca ocb occ ocd oco ocr oct ocu oda odb odc odd odo odr odt odu oo- ooa oob ooc ood ooo oor oot or- ora orb orc ord oro orr ort oru ot- ota otb otc otd oto otr ott otu ou- oua ouc oud ouo our out ra- raa rab rac rad rao rar rat rau rba rbb rbc rbd rbo rbr rbt rbu rca rcb rcc rcd rco rcr rct rcu rda rdb rdc rdd rdo rdr rdt rdu roa rob roc rod roo ror rot rou rra rrb rrc rrd rrr rrt rru rta rtb rtc rtd rto rtr rtt rtu rua rub ruc rud ruo rur rut ruu taa tab tac tad tao tar tat tau tba tbb tbc tbd tbo tbr tbt tbu tca tcb tcc tcd tco tcr tct tcu tda tdb tdc tdd tdo tdr tdt tdu to- toa tob toc tod too tor tot tou tra trb trc trd tro trr trt tru tta ttb ttc ttd tto ttr ttt ttu tua tub tuc tud tuo tur tut tuu ua- uaa uab uac uad uao uar uat uau uba ubb ubc ubo ubr ubt ubu uca ucb ucc ucd uco ucr uct ucu uda udb udc udd udo udr udt udu uoa uob uoc uod uoo uor uot ur- ura urb urc urd uro urr urt uru uta utb utc utd uto utr utt utu uua uuc uur uut uuu

a-do aaaa aaab aaac aaad aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aaco aacr aact aacu aada aadc aadt aadu aaoo aara aarc aard aaro aart aaru aata aatc aatt abaa abab abac abad abar abat abau abb- abba abbb abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo abdu aboa abob abod aboo abor abot abou abra abrc abro abta abtu abua abud abut ac-t acaa acab acac acad acar acat acba acca accc accd acco acct accu acda acdb acdc acdt acoa acod acor acot acou acr- acra acrc acro acrr acta actc acto actt actu acu- acuo acur acut adaa adab adac adad adao adar adat adba adbc adcc adda addc addd addo addr addu adob adoc adod adoo ador adot adra adro adta adua adub adur aoba aoca aora aorb aort aotc aotd aout arab arac arad arar arat arau arba arc- arca arco arct arda ardc ardo ardu aroa arob arod aroo aror arr- arra arrc arro arrr arrt arru arta artc arto artr arua arub arud arut at-t ataa atab atac atad atar atat atca atcc atco atcr atdt atob atoc atod ator atot atra atrc atro atru atta atto attr attu atua atub atuc atur auaa auca auct audc audo aur- aura aurd auro aut- auto baaa baad baar baat baba babb babo babr babu bac- baca bacc baco bact bada badb badd bado badr badu bar- bara barb barc bard baro barr bart baru bata batc bato batt batu bau- baud baur bbad bbau bbbb bbdd bbdo bbrc bcaa bcar bcat bcbc bcca bccc bcda bcor bcra bcru bctc bcuc bd-r bdbc bddc boab boac boad boar boat boba bobb bobo bobu boca boco bocu boda bodb bodo bodu boob booc bood boor boot bor- bora bord boro borr bort boru bota botb botd boto bott boua boud bour bout brab brac brad brao brat brau brca brcb brda brdo brdt broa brob broc brod broo bror brot brou brrr brtc bruc brud brut btaa btcc btdt btob btor btrc btrt bttb buad buar buat buba bubb bubo bubu buca bucc buco bucu buda budb budd budo budu bur- bura burb burd buro burr burt buru but- buta buto butt c-bo c-cd caaa caab caac caat caba cabo cabu cac- caca cacc caco cacr cada cadc cadd cado cadr cadu caod caor cara carb carc card caro carr cart cat- cata catb catc catd cato catt catu cauc cauo caut cbac cbar cbat cbbc cbca cbcc cbcr cbct cbcu cbdb cbdc cbdo cbot cbrd cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc cccu ccdc ccdr ccob ccoc ccod ccra ccrc ccrt cctb cctc cctt ccuc ccut cd-r cdaa cdac cdad cdba cdda cddb cddr cdot coad coat coba cobb cobo cobu coca coco coct cocu coda codd coob