aaaa aaab aaac aaar aaba aabb aabc aabt aaca aacb aacc aaco aacr aact aaoo aara aarc aaro aart aata aatc aatt abaa abab abac abar abat abb- abba abbb abbo abbr abbt abca abcb abcc abcr abct aboa abob aboo abor abot abra abrc abro abta abza ac-t acaa acab acac acar acat acba acca accc acco acct acoa acor acot acr- acra acrc acro acrr acta actc acto actt aoba aoca aora aorb aort aotc arab arac arar arat arba arc- arca arco arct aroa arob aroo aror aroz arr- arra arrc arro arrr arrt arta artc arto artr artz arza arzo at-t ataa atab atac atar atat atca atcc atco atcr atob atoc ator atot atoz atra atrc atro atta atto attr aza- azab azar azat azaz azca azo- azoo azor azot azra azza azzo baaa baar baat baaz baba babb babo babr bac- baca bacc baco bact bacz bar- bara barb barc baro barr bart barz bata batc bato batt batz baza bazo bbbb bbrc bcaa bcar bcat bcbc bcca bccc bcor bcoz bcra bctc boab boac boar boat boaz boba bobb bobo boca boco boob booc boor boot booz bor- bora boro borr bort borz bota botb boto bott boza bozo brab brac brao brat braz brca brcb broa brob broc broo bror brot broz brrr brtc brza btaa btcc btob btor btrc btrt bttb bzzt bzzz c-bo caaa caab caac caat caba cabo cac- caca cacc caco cacr caor caoz cara carb carc caro carr cart cat- cata catb catc cato catt catz caza cazo cbac cbar cbat cbbc cbca cbcc cbcr cbct cbot cbrt cbta cbtc ccaa ccab ccac ccar ccat ccba ccbc ccca cccb cccc ccob ccoc ccra ccrc ccrt cctb cctc cctt coat coba cobb cobo coca coco coct coob coot cor- cora corb corc coro corr cort cota cotb cotc coto cott cozz crab crac crar crat crbc crca crcc crcr crcz crob croc croo cror crot croz crrt crtc ctab ctba ctca ctor ctot ctrc ctta czar oara obba obbo obor obot obra obro ocab ocac ocat ocbc occa occc occt ocra ocro ocrr oct- octa octo ooaa ooba oocr oooo oora oort ootb orab orac orao orar orat orba orbb orbo orca orco oro- oror orot oroz orra orro orta ortc orto orzo otac otar oto- otoo otor otra otro otta otto ozar raab raat raaz raba rabb rabo rac- raca racc raco ract raob raoc rara rarb raro rarz rata rato ratt ratz raza razo razr razz rbbb rbbr rcac rcbc rcbo rccb rccc rctc roab roar roat rob- roba robb robo robt roca rocc roco roob roor root rooz rora rorc roro rort rota rotc roto rotr rott roza rozz rrat rrrr rtca rtcc rzab taa- taar taat taba tabb tabc tabo taca tacc taco tact taoa taor tara tarb tarc taro tarr tart tata tatb tato tatr tatt tatz taza tazo tazr tazz tbar tbca tbcb tbcc tbrb tbta tcca tccc tctc toab toat toba tobo tobt toca toco tooa toor toot tora torc toro torr tort tota totc toto totr tott toza tozo traa trab trac trao trat traz trca trcc troa troc troo trot trra trtc trtr ttab ttbb tttt tzar tzzt z-ro zaar zaat zaba zabo zabr zaca zara zarb zaro zarr zaza zbar zcar zcta zoar zoat zobo zoco zoo- zoot zora zorb zorc zoro zort zota zott zotz zoza zozo ztoa zzzz