-er a-a a-b a-c a-t aaa aab aac aae aao aar aat aau aav ab- aba abb abc abe abo abr abt abu abv ac- aca acb acc ace aco acr act acu acv aea aeb aec aee aeo aer aet aeu aev aoa aob aoc aoe aoo aor aot aou aov ar- ara arb arc are aro arr art aru arv at- ata atb atc ate ato atr att atu atv au- aua aub auc aue auo aur aut auv av- ava avb avc ave avo avr avt avu b-u baa bab bac bae bao bar bat bau bav bba bbb bbc bbe bbo bbr bbt bbu bca bcb bcc bce bco bcr bct bcu bcv be- bea beb bec bee beo ber bet beu bev boa bob boc boe boo bor bot bou bov bra brb bre bro brr brt bru brv bta btb btc bte bto btr btt btu btv bua bub buc bue buo bur but buu bva bvb bvc bve bvo bvr bvt bvu bvv c-- caa cab cac cae cao car cat cau cav cba cbb cbc cbe cbo cbr cbt cbu cbv cca ccb ccc cce cco ccr cct ccu ccv ce- cea ceb cec cee ceo cer cet ceu cev co- coa cob coc coe coo cor cot cou cov cra crb crc cre cro crr crt cru crv cta ctb ctc cte cto ctr ctt ctu ctv cua cub cuc cue cuo cur cut cuu cuv cva cvb cvc cve cvo cvr cvt cvu cvv eaa eab eac eae eao ear eat eau eav eba ebb ebc ebe ebo ebr ebt ebu ebv ec- eca ecb ecc ece eco ecr ect ecu ecv eea eeb eec eee eeo eer eet eev eo- eoa eob eoc eoe eoo eor eot eou era erb erc ere ero err ert eru erv eta etb etc ete eto etr ett etu etv eu- eua eub euc eue eur eut euv eva evb evc eve evo evr evt evv oaa oab oac oae oao oar oat oau oav ob- oba obb obc obe obo obr obt obu obv oc- oca ocb occ oco ocr oct ocu ocv oea oeb oec oee oeo oer oet oo- ooa oob ooc ooo oor oot oov or- ora orb orc ore oro orr ort oru orv ot- ota otb otc ote oto otr ott otu otv ou- oua ouc oue ouo our out ov- ova ovb ovc ove ovo ovv ra- raa rab rac rae rao rar rat rau rav rba rbb rbc rbe rbo rbr rbt rbu rca rcb rcc rce rco rcr rct rcu rcv re- rea reb rec ree reo rer ret reu rev roa rob roc roe roo ror rot rou rov rra rrb rrc rrr rrt rru rta rtb rtc rte rto rtr rtt rtu rtv rua rub ruc rue ruo rur rut ruu ruv rva rvb rvc rve rvo rvr rvt rvu rvv taa tab tac tae tao tar tat tau tav tba tbb tbc tbe tbo tbr tbt tbu tbv tca tcb tcc tce tco tcr tct tcu tcv te- tea teb tec tee teo ter tet teu tev to- toa tob toc toe too tor tot tou tov tra trb trc tre tro trr trt tru trv tta ttb ttc tte tto ttr ttt ttu ttv tua tub tuc tue tuo tur tut tuu tuv tva tvb tvc tve tvo tvr tvt tvu ua- uaa uab uac uae uao uar uat uau uav uba ubb ubc ube ubo ubr ubt ubu ubv uca ucb ucc uce uco ucr uct ucu ucv uea ueb uec uee uer uet uoa uob uoc uoe uoo uor uot ur- ura urb urc ure uro urr urt uru uta utb utc ute uto utr utt utu utv uua uuc uue uur uut uuu uva uvb uvc uve uvo uvu uvv v-a v-e vaa vab vac vae vao var vat vau vav vba vbc vbo vbr vbv vca vcc vce vco vcr vct vcu vea veb vec vee veo ver vet veu voa vob voc voe voo vor vot vou vov vra vrb vrc vre vrr vrt vru vta vtb vtc vte vto vtr vtt vtu vtv vue vur vut vuv vva vvb vvc vvo vvr vvt vvv

-vac a-be aaaa aaab aaac aaae aaar aaav aaba aabb aabc aabt aaca aacb aacc aace aaco aacr aact aacu aacv aaea aaec aaev aaoe aaoo aara aarc aare aaro aart aaru aata aatc aatt aava abaa abab abac abae abar abat abau abb- abba abbb abbe abbo abbr abbt abca abcb abcc abcr abct abec abee aber abet aboa abob aboo abor abot abou abov abra abrc abro abta abtu abua abue abut abva ac-t acaa acab acac acae acar acat acba acca accc acce acco acct accu ace- acea acec acer acet acev acoa acoe acor acot acou acr- acra acrc acre acro acrr acrv acta actc acte acto actt actu actv acu- acue acuo acur acut acvv aeac aecb aect aeer aer- aera aerc aero aeta aetc aeto aetr aett aeva aoba aoca aoce aoeu aora aorb aort aotc aout arab arac arae arar arat arau arba arbe arc- arca arce arco arct area arec aree areo aret areu arev aroa arob aroe aroo aror arr- arra arrc arre arro arrr arrt arru arta artc arte arto artr artv arua arub arue arut arva arve arvo at-t ataa atab atac atae atar atat atca atcc atco atcr atea atec atee ateo ater atob atoc atoe ator atot atra atrc atre atro atru atta atte atto attr attu atua atub atuc atur auaa aube auca auce auct auer aur- aura aure auro aut- aute auto auve avab avao avar avat avcc avce avco avea avec aveo aver aveu avor avot avou avra avre avro avur avva avvo baaa baar baat baba babb babe babo babr babu bac- baca bacc bace baco bact baer bar- bara barb barc bare baro barr bart baru bata batc bate bato batt batu