bbbb bbeb bebb bebe bebi bebo beeb beef beer befe beff befo behr beir beo- beof beor bere beri bero berr bher bhff bhie bhir bhoi bhor bibb bibe bibi bibo bieb bief bier biff bifi bihe bihi bio- bioi birb bire biri biro birr bobb bobe bobi bobo boee boef boeo boer bofe boff bofh boho bohr boi- boie boii boob booe boof booh boor bor- bore borf borh bori boro borr breb bree bref brei breo brer brie brih brio brob broe broh broo bror brrr ebbo ebbr eber eboe eboo ebor ebro eeee eefe eero efbr efeo effi efor eheh eher ehre eiei eier eiho eire eoir eore eori erbb erbe ereb erei erer erie erih erio erob eroe eroi eroo erre erro febo feeb feer fefe feff fefi fefo fehr feie feio feir feof feoh ferb fere fero ferr ffee ffff ffii ffrr fibe fief fier fife fiff fifi fifo fiii fioe fior fire foer fofo fohr foie foof for- forb fore fori foro forr free frei freo frib frie frio frob froe froh h-ii hbio hebb hebe hebi hebo hebr heeb heef heer hefe hehe heho heie heif heih heir heor herb here heri hero herr hhhh hhof hibi hiei hier hiff hifh hifi hifo hifr hihe hihi hiho hiie hiob hire hirf hiri hiro hobe hobo hoei hoer hofe hoff hohe hoho hoie hoif hoir hooe hoof hoor hore hori horo horr hree hrib hrob i-be ibeh ibfi ibie ibri ibro ieie ieio ieoh iere ieri ifbb ifer ifhe ifor ifrb ifrf ifri iher ihob ihre iiie iiii iiio iioi iioo iobi ioee ioii ioio ioof iooi iooo iore iori irbe iree irer irfe iri- irie irio irob iroh irre irri o-eo obbo ober obie oboe oboi obor obre obrh obri obro oere ofer off- offe offh offo offr ofor ofre ohbe ohee oher ohhi ohho ohif ohio ohob ohoh ohre oier oiii oire oobe oobi ooer ooff ooho oooh oooo oore orbb orbe orbi orbo ore- oreb oreh oreo orer orfe orff orfi orhe ori- orie orif orio oro- oroe orof oror orri orro rbbb rbbr rboh rebb rebe rebo reeb reef refe reff refi refr rehb rehe rehi reif reii reir reof rere reri rero rfef rheb rhee rheo rhib rhio rhob rhoh rib- ribe ribo rief rier rife riff riho riif rire riri rob- robb robe robi robo roer rofe roff rofo rohe rohr roif roio roir roob roof rooi roor rore rori roro rrif rrrr