oocr ooho oohs ooms oooh oooo ooos oosi oous orbb orbi orbo orbs orbu orch orci orco orcs orhs ori- oric orio oris ormo oro- orom oror oros orri orro orrs orsi orso orsu orub orum orus oscc osci osco oshc oshi osho oshs oshu osii osim osis osm- osmo osoi osoo osor osos osro ossb ossi osso ossu osum oubs oucc ouch ouii ouir ouis oumi our- ouro ours ouu- rbbb rbbr rbbs rbhs rbis rbms rboh rbss rcbc rcbo rccb rccc rccs rchb rchm rchs rcic rcis rcms rcos rcsc rcsi rcss rhcm rhhs rhib rhim rhio rhob rhoc rhoh rhos rhsm rhum rhus rib- ribo ribs ribu ricc rich rico rics riho rihs riis rimi rimm rimo rims rimu riom rios riou riri rirs risc rish risi rism riso riss risu rius rmbs rmhs rmsc rob- robb robi robo robs robu rocc roch roco rocs rohm rohr rohs rohu roio roir rois roiu romb romi romm romo roms roob rooi room roor roos rorc rori roro roru rosc rosh rosi roso ross roub rouh roum rous rrhs rrmc rrrr rrum rsbi rscc rsch rscs rshs rsis rsos rsum rubb rubi rubs rubu ruch ruci ruhh ruhi ruhm ruhr ruhs ruis rumb rumi rumm rumo rums rurc ruri ruro rurs ruru rush rusi ruso russ rusu s-ib s-ic s-ii s-os sbbs sbcc sbcs sbhc sbhs sbic sbmc sbor sbsi sbus scbi sccc sccm sccs sch- schh schi scho schr schs sci- scic scim scio scir scis scmc scmm scmo scms scob scoh scom scoo scor scr- scrc scri scrs scsc scsh scsi scso scsr scsu scub scum scur shbm shbs shcc shhh shhs shib shih shii shim shio shir shis shiu shm- shmo shom shoo shor shos shou shri shrs shsc shub shui shum shur shus shuu sibc sibi sibo sibs sibu sicc sich sici sicm sico sics sicu sihi sihr sihs sihu siim simh simi simm simo sims sior sios siou sirc siri siro sirr sirs siru sisc sish sisi siss sisu siui sium sius smbc smbh smcc smch smhs smic smis smoc smos smsc smsh smss smur smus sobo sobr sobs sobu soch soci socm soco socr socs sohh sohm soho sohs sohu soic soim soir sois somb somi somm somo soom soor soos sorb sorh sori sorm soro sorr sors soru sosh sosi soso soss soum sour sous srbc srcc srch srhs srib srim sris srmc sros srub ssbr sscc ssci sscs sshs ssis ssmc ssoc ssrc ssri ssrm ssrs sssb sssc sssh sssi sssm ssss sub- subb subh subi subm subo subs suc- succ such suci sucr sucs suhb suhi suho suhr suio suir suis sum- sumi sumo sums sumu suoh suor suos sur- surc suri suro surr surs suru sus- susi suso suss susu suum suus ubbi ubbo ubic ubii ubir ubis uboc ubos ucbc ucci uchi ucho uchs ucio ucmc ucom ucos ucrc ucsb ucsc ucsm ucsu uhoh uhrs uhss uhuh uims uirr umb- umbi umbo umhs ummo umms umor umri umsu umus uocc uomo uor- urbi urbs urch urci urho urib uric urim uris uriu urmi uro- urom uroo urrh urri ursi urso urss ursu urum urur urus usbc usbr usbs uscc usch uscm usco uscs ushi usho ushr ushs ushu usim usis usmc usmm usms usoc usoi usos ussb ussc ussr usss ussu usui usus uuoc uuri uusi uuuu