a-ha aaaa aaab aaah aaap aaar aaba aabb aabh aabp aaha aaoo aapa aaph aapo aara aaro aarp abaa abab abap abar abb- abba abbb abbo abbr abha abho abhr aboa abob aboh aboo abor abpa abpp abpr abra abro ahab ahah ahar ahha ahoa ahop ahor ahra ahrr aoah aoba aopo aora aorb apah apao apap apar apba apbr aph- apha apo- apoo apop apor appa apph appr apra apro arab arah arap arar arba arbh arh- aroa arob aroo aror arpa arr- arra arrh arro arrr baaa baah baar baba babb babo babr baha baho bahr baoh bapa bapp bar- bara barb barh baro barr bbbb bbpr bhao bhar bhor bhra boab boar boba bobb bobo boha boho bohr boob booh boop boor bopa bopp bor- bora borh boro borr brab brah brao broa brob broh broo bror brrr haab haar haba habo haha haho haor hapa happ hara harh haro harp harr hbar hhaa hhhh hhpa hoap hoar hoba hobo hoha hoho hoop hoor hopa hopo hopp hora horo horr hpao hrap hrob hrpp oahp oaph oara obba obbo obor obra obrh obro ohba ohho ohob ohoh ohra ooaa ooba ooha ooho oooh oooo oora opah opap opar opo- opor oppa oppo opra orab orah orao orar orba orbb orbo oro- oror orph orra orro paap paar paba paha paho pahp paoh papa papb papp papr par- para paro parp parr pbar pbpa phah phar phob phoh phoo phpa phrr poar poba pobo poha pooh poop poor pop- popa popo popp pora porb poro porr ppap ppar ppoa pppa pppo pppp prao prar pro- proa prob proo prop raab raba rabb rabo raha rahr raob raoh raop rapa raph rapp rara rarb raro rbbb rbbr rboh rhap rhoa rhob rhoh roab roap roar rob- roba robb robo roha rohr roob roop roor ropa ropo rora roro rpho rpob rrah rrrr