a-a a-b a-c a-t aaa aab aac aad aao aar aat ab- aba abb abc abd abo abr abt ac- aca acb acc acd aco acr act ad- ada adb adc add ado adr adt aoa aob aoc aod aoo aor aot ar- ara arb arc ard aro arr art at- ata atb atc atd ato atr att baa bab bac bad bao bar bat bba bbb bbc bbd bbo bbr bbt bca bcb bcc bcd bco bcr bct bda bdb bdc bdd bdo bdr bdt boa bob boc bod boo bor bot bra brb brd bro brr brt bta btb btc btd bto btr btt c-- caa cab cac cad cao car cat cba cbb cbc cbd cbo cbr cbt cca ccb ccc ccd cco ccr cct cda cdb cdc cdd cdo cdr cdt co- coa cob coc cod coo cor cot cra crb crc crd cro crr crt cta ctb ctc ctd cto ctr ctt daa dab dac dad dao dar dat dba dbb dbc dbd dbo dbr dbt dca dcb dcc dcd dco dcr dct dda ddb ddc ddd ddo ddr ddt doa dob doc dod doo dor dot dra drb drc drd dro drr drt dta dtb dtc dtd dto dtr dtt oaa oab oac oad oao oar oat ob- oba obb obc obd obo obr obt oc- oca ocb occ ocd oco ocr oct oda odb odc odd odo odr odt oo- ooa oob ooc ood ooo oor oot or- ora orb orc ord oro orr ort ot- ota otb otc otd oto otr ott ra- raa rab rac rad rao rar rat rba rbb rbc rbd rbo rbr rbt rca rcb rcc rcd rco rcr rct rda rdb rdc rdd rdo rdr rdt roa rob roc rod roo ror rot rra rrb rrc rrd rrr rrt rta rtb rtc rtd rto rtr rtt taa tab tac tad tao tar tat tba tbb tbc tbd tbo tbr tbt tca tcb tcc tcd tco tcr tct tda tdb tdc tdd tdo tdr tdt to- toa tob toc tod too tor tot tra trb trc trd tro trr trt tta ttb ttc ttd tto ttr ttt

a-do aaaa aaab aaac aaad aaar aaba aabb aabc aabd aabt aaca aacb aacc aacd aaco aacr aact aada aadc aadt aaoo aara aarc aard aaro aart aata aatc aatt abaa abab abac abad abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abcd abcr abct abda abdo aboa abob abod aboo abor abot abra abrc abro abta ac-t acaa acab acac acad acar acat acba acca accc accd acco acct acda acdb acdc acdt acoa acod acor acot acr- acra acrc acro acrr acta actc acto actt adaa adab adac adad adao adar adat adba adbc adcc adda addc addd addo addr adob adoc adod adoo ador adot adra adro adta aoba aoca aora aorb aort aotc aotd arab arac arad arar arat arba arc- arca arco arct arda ardc ardo aroa arob arod aroo aror arr- arra arrc arro arrr arrt arta artc arto artr at-t ataa atab atac atad atar atat atca atcc atco atcr atdt atob atoc atod ator atot atra atrc atro atta atto attr baaa baad baar baat baba babb babo babr bac- baca bacc baco bact bada badb badd bado badr bar- bara barb barc bard baro barr bart bata batc bato batt bbad bbbb bbdd bbdo bbrc bcaa bcar bcat bcbc bcca bccc bcda bcor bcra bctc bd-r bdbc bddc boab boac boad boar boat boba bobb bobo boca boco boda bodb bodo boob booc bood boor boot bor- bora bord boro borr bort bota botb botd boto bott brab brac brad brao brat brca brcb brda brdo brdt broa brob broc brod broo bror brot brrr brtc btaa btcc btdt btob btor btrc btrt bttb c-bo c-cd caaa caab caac caat caba cabo cac- caca cacc caco cacr cada cadc cadd cado cadr caod caor cara carb carc card caro carr cart cat- cata catb catc catd cato catt cbac cbar cbat cbbc cbca cbcc cbcr cbct cbdb cbdc cbdo cbot cbrd cbrt cbta cbtc ccaa ccab ccac ccad ccar ccat ccba ccbc ccca cccb cccc ccdc ccdr ccob ccoc ccod ccra ccrc ccrt cctb cctc cctt cd-r cdaa cdac cdad cdba cdda cddb cddr cdot coad coat coba cobb cobo coca coco coct coda codd coob cood coot cor- cora corb corc cord coro corr cort cota cotb cotc coto cott crab crac crar crat crbc crca crcc crcr crda crdc crob croc crod croo cror crot crrt crtc ctab ctba ctca ctor ctot ctrc ctta d-bo daab daad daar daba dabb dabo dabt daca dact dada dado dara darb darc dard daro darr dart data dato datr datt dbar dbcc dbtt dcbc dcca dccb dccc dcct dcdb dcra dctc dddd ddoc ddot ddrc doab doar doat doba dobb doca doco doct dod- doda dodd dodo doob dood door doot dora dorc dord doro dorr dort dota dotd doto dott draa drab drac drad drar drat drba drbc drca drda drob drod drot drra dtaa dtac dtcc dtor dtot oara obad obba obbo obdt obor obot obra obro obtd ocab ocac ocad ocat ocbc occa occc occt ocra ocro ocrr oct- octa octo odac odbo odda oddd odoo odor odot odra ooaa ooba oocr ooda oooo oora oord oort ootb orab orac orad orao orar orat orba orbb orbo orca orco orda ordo oro- oror orot orra orro orta ortc orto otac otar otbd otcd oto- otoo otor otra otro otta otto raab raad raat raba rabb rabo rac- raca racc raco ract rada radc radd rado radr radt raob raoc rara rarb raro rata rato ratt rbbb rbbr rcac rcbc rcbo rccb rccc rcdc rcrd rctc rdac rdoc roab road roar roat rob- roba robb robo robt roca rocc roco roda rodd rodo roob rood roor root rora rorc roro rort rota rotc roto rotr rott rrad rrat rrrr rtca rtcc rtdt taa- taar taat taba tabb tabc