a-be aaaa aaab aaae aaap aaar aaba aabb aabp aaea aaep aapa aara aare aarp abaa abab abae abap abar abb- abba abbb abbe abbr abee aber abez abpa abpp abpr abra abza aeap aeer aer- aera apap apar apba apbr apea apep aper appa appr apra apre arab arae arap arar arba arbe area aree arep arpa arpe arr- arra arre arrr arza aza- azab azap azar azaz azer azra azza baaa baar baaz baba babb babe babr baer baez bapa bape bapp bar- bara barb bare barr barz baza baze bbbb bbeb bbpr beap bear beba bebb bebe beeb beep beer bera bere berr beze bpea brab brae braz brea breb bree brep brer brez brrr brza bzer bzzz eaba eapp eara earb eare earp ebba ebbr eber eeea eeee eera eeze epaa epee eper eppa eppp epra eprb eprp erap eraz erba erbb erbe ereb erer erez erpa erpe erra erre ezer ezra paap paar paaz paba paea paep paer paez papa papb pape papp papr par- para pare parp parr paza pbar pbpa peab peap pear peba peep peer pepa pepe per- pera pere perp perr peza peze ppap ppar pper pppa pppp prae prar praz pre- preb pree prep prez raab raaz raba rabb rabe raep raer rapa rape rapp rara rarb rare rarz raza raze razr razz rbbb rbbr rea- reae reap rear reba rebb rebe reeb reep repe repp repr rera rere reza reze rrrr rzab zaar zaba zabr zaer zapp zara zarb zare zarr zaza zbar zber zeae zeba zebe zeep zepp zera zeze zrze zzzz