aaaa aaab aaar aaba aabb aabt aaoo aara aaro aart aata aatt abaa abab abar abat abb- abba abbb abbo abbr abbt aboa abob aboo abor abot abra abro abta abza aoba aora aorb aort arab arar arat arba aroa arob aroo aror aroz arr- arra arro arrr arrt arta arto artr artz arza arzo at-t ataa atab atar atat atob ator atot atoz atra atro atta atto attr aza- azab azar azat azaz azo- azoo azor azot azra azza azzo baaa baar baat baaz baba babb babo babr bar- bara barb baro barr bart barz bata bato batt batz baza bazo bbbb boab boar boat boaz boba bobb bobo boob boor boot booz bor- bora boro borr bort borz bota botb boto bott boza bozo brab brao brat braz broa brob broo bror brot broz brrr brza btaa btob btor btrt bttb bzzt bzzz oara obba obbo obor obot obra obro ooaa ooba oooo oora oort ootb orab orao orar orat orba orbb orbo oro- oror orot oroz orra orro orta orto orzo otar oto- otoo otor otra otro otta otto ozar raab raat raaz raba rabb rabo raob rara rarb raro rarz rata rato ratt ratz raza razo razr razz rbbb rbbr roab roar roat rob- roba robb robo robt roob roor root rooz rora roro rort rota roto rotr rott roza rozz rrat rrrr rzab taa- taar taat taba tabb tabo taoa taor tara tarb taro tarr tart tata tatb tato tatr tatt tatz taza tazo tazr tazz tbar tbrb tbta toab toat toba tobo tobt tooa toor toot tora toro torr tort tota toto totr tott toza tozo traa trab trao trat traz troa troo trot trra trtr ttab ttbb tttt tzar tzzt z-ro zaar zaat zaba zabo zabr zara zarb zaro zarr zaza zbar zoar zoat zobo zoo- zoot zora zorb zoro zort zota zott zotz zoza zozo ztoa zzzz