drob drod drot drou drra drrs drsa drua drub drus drut druu dsac dsba dsbc dscc dscr dscs dsda dsdr dsoa dsos dsrc dsrr dssa dssc dsst dstc dsto dsts dtaa dtac dtcc dtor dtot dtss duaa duab duad duar duas duat dub- duba dubb dubc dubs dubu duca duco ducs duct duda dudd dudo duds dudu duo- duos dura duro durt duru dusa dust duta duts duur duut oaau oara oars oasc oass oast oats obad obas obba obbo obdt obor obos obot obra obro obsd obsr obss obst obtd obts obus ocab ocac ocad ocas ocat ocbc occa occc occt ocds ocos ocra ocro ocrr ocrs ocsa oct- octa octo octs ocur odac odas odbo odda oddd odds odoo odor odos odot odou odra odso odts odtu odur odus ooaa ooba oocr ooda oooo ooos oora oord oort oosa oost ootb oots oous orab orac orad orao orar oras orat orba orbb orbo orbs orbu orca orco orcs orda ordo ords ordu oro- oror oros orot orra orro orrs orsa orso orsu orta ortc orto orts orub orus osar osas osat osba osca oscc osco osoo osor osos osrd osro ossa ossb ossd osso ossu osta ostc ostr osts otac otar otas otbd otbs otcd oto- otoo otor otos otra otro otrs otsa otso otsu otta otto otts ottu otur otus ouac ouad ouat oubs oucc oudc ouds our- oura ouro ours ourt ousa ousd oust out- outa outb outo outs ouu- raab raad raas raat raba rabb rabo rabs rabu rac- raca racc raco racs ract racu rada radc radd rado radr rads radt radu raob raoc raos rara rarb raro rars rasa rasc rasd raso rass rast rasu rata rato rats ratt ratu raua raub rauc raud raus raut rbbb rbbr rbbs rbds rbsd rbss rbst rcac rcas rcbc rcbo rccb rccc rccs rcdc rcds rcos rcrd rcsa rcsc rcsd rcss rctc rcts rdac rdas rdoc rdos rdso roab road roar roas roat rob- roba robb robo robs robt robu roca rocc roco rocs roda rodd rodo rods roob rood roor roos root rora rorc roro rort roru rosa rosc roso ross rost rota rotc roto rotr rots rott roua roub roud rous rout rrad rras rrat rrrr rsaa rscc rscs rsdd rsds rsos rssa rsts rstu rsua rtas rtca rtcc rtdt rtss rtts ruad ruas ruba rubb rubs rubu ruca ruct ruda rudd rudo ruds rura rurc rurd ruro rurs ruru rusa ruso russ rust rusu ruta ruto ruts rutt rutu ruud s-os sa-c saab saac saad saar saas saat saba sabb sabc sabo sabr sabs sabu saca sacc sacd saco sacr sacs sact sacu sada sadb sadc sadd sado sadr sads sadt sadu saor saos saou sara sarc sard saro sarr sars sart saru sasa sasc sasd saso sass sast sata satb satc satd sato satr sats satt satu saua sauc saud saur saus saut sbaa sbac sbar sbas sbbs sbca sbcc sbcs sbct sbds sbor sbot sbsa sbsd sbst sbtc sbus scaa scab scac scad scar scas scat scba sccc sccs scct scda scdc scds scob scoo scor scot scr- scra scrc scrs scsa scsc scsd scso scsr scst scsu sctc sctd scto sctr scts scua scub scud scur scut sdau sdba sdcc sdco sddc sdds sdot sdrc sdrs sdsc sdss sdsu soad soar soas soat soba sobo sobr sobs sobt sobu soca soco socr socs soda sodd sodo sods sodu sood soor soos soot sora sorb sord soro sorr sors sort soru sosa soso soss sost sota sotc soto sots sotu soud sour sous sout sras srbc srcc srct sros srsd srta srtr srub ssaa ssab ssac ssao ssas ssat ssau ssbr ssca sscc sscs ssdc ssdd ssoc ssot ssra ssrc ssrs sssa sssb sssc ssss ssta sstb sstc sstd ssts stab stac stad star stas stat stau stbc stbd stbs stca stcc stcs stcu stds stoa stob stod stoo stor stos stot stou stra strc strd stro strs stru stss sttc sttd sttr stub stuc stud stur stus stut suar suas suat sub- suba subb subd subo subs suc- succ sucr sucs suda sudd sudo suds suor suos sur- sura surc surd suro surr surs surt suru sus- susa susd suso suss sust susu suta suto sutu suus taa- taar taas taat taba tabb tabc tabo tabs tabu taca tacc taco tacs tact tada tado tads taoa taor taos taou tara tarb tarc tard taro tarr tars tart taru tasa tasb tasc tasr tass tast tasu tata tatb tato tatr tats tatt tatu taua taub tauc taur taus taut tbar tbas tbbs tbca tbcb tbcc tbcd tbrb tbst tbta tcad tcbs tcca tccc tccu tcdd tcos tctc tcts tdac tddb tdor tdra tdss toab toad toas toat toau toba tobo tobs tobt tobu toca toco toda todd todo tods todt todu tooa tood toor toos toot tora torc tord toro torr tors tort toru tosa tosb tosc toso toss tost tosu tota totc totd toto totr tots tott tour tous tout traa trab trac trad trao tras trat trau trca trcc troa troc trod troo tros trot trou trra trsd trst trtc trtr trub truc trud trus trut truu tsaa tsao tsar tsat tsau tsbc tsbd tsca tscc tsdb tsob tsos tsou tssa tssr tsst tstc tsts ttab ttbb ttss tttt tuao tuar tuas tuat tuba tubb tubo tubr tubs tubu tuca tucc tuco tudu tuor tuos tura turb turc turd turo turr turs turt turu tusa tusc tusd tuss tust tuta tuto tuts tutt tutu tuuo uabc uaca uaoc uarc uars uart uaru uasa uasd uata uatu uaua ubac ubar ubba ubbo uboc ubod ubos ubra ubud ucad ucar ucas ucat ucbc ucca ucdc ucdd ucos ucrc ucsa ucsb ucsc ucsd ucst ucsu ucua ucut udaa udad udar udas udau udbc udca udds udoo udos udot udra udsd udts uocc uor- urac urad urao uras urat urau urba urbs urca urda urds urdu uro- uroa uroo urra ursa urso urss ursu urts urur urus urut us-a usaa usac usad usar