a-do aaaa aaab aaad aaar aaba aabb aabd aada aaoo aara aard aaro abaa abab abad abar abb- abba abbb abbo abbr abda abdo aboa abob abod aboo abor abra abro abza adaa adab adad adao adar adba adda addd addo addr adob adod adoo ador adra adro aoba aora aorb arab arad arar arba arda ardo aroa arob arod aroo aror aroz arr- arra arro arrr arza arzo aza- azab azad azar azaz azo- azoo azor azra azza azzo baaa baad baar baaz baba babb babo babr bada badb badd bado badr bar- bara barb bard baro barr barz baza bazo bbad bbbb bbdd bbdo bd-r boab boad boar boaz boba bobb bobo boda bodb bodo boob bood boor booz bor- bora bord boro borr borz boza bozo brab brad brao braz brda brdo broa brob brod broo bror broz brrr brza bzzz d-bo daab daad daar daba dabb dabo dada dado dara darb dard daro darr darz dazz dbar dddd doab doar doba dobb dod- doda dodd dodo doob dood door dora dord doro dorr doza dozo draa drab drad drar drba drda drob drod droz drra dzar dzbb dzor dzrr oara obad obba obbo obor obra obro odbo odda oddd odoo odor odra ooaa ooba ooda oooo oora oord orab orad orao orar orba orbb orbo orda ordo oro- oror oroz orra orro orzo ozar ozd raab raad raaz raba rabb rabo rada radd rado radr raob rara rarb raro rarz raza razo razr razz rbbb rbbr roab road roar rob- roba robb robo roda rodd rodo roob rood roor rooz rora roro roza rozz rrad rrrr rzab z-ro zaar zaba zabo zabr zada zara zarb zard zaro zarr zaza zbar zdar zoar zobo zoda zodd zoo- zora zorb zord zoro zoza zozo zzzz