ls-r lsbu lscb lscs lses lsfc lsrc lssr lube lubs luce luci lucs luef luer lues lufe luff lufu luif luis lule luli lull lulu lure luri lurs luse lusi luss rbbb rbbr rbbs rbcl rbis rble rbsl rbss rcbc rccb rccc rccs rcfc rcic rcis rcle rcls rcsc rcsi rcsl rcss rebb rebe rebs rebu recc rece reci recr recs recu reeb reef reel rees refe reff refi refl refr refs refu reif reii reil reir reis reiu relb rele rell rels rere reri rers reru rese resi ress reue reuf reul reus reuu rfef rffc rffl rfic rib- ribe ribs ribu ricc rice rics rief riel rier ries rieu rife riff rifs rifu riif riis rile rill rilu rire riri rirs risc rise risi riss risu riue rius rlcs rlee rlef rleu rlif rlls rrfc rrif rrle rrrr rsbi rscc rscs rsee rsfc rsis rslc rsre rssl rubb rube rubi rubs rubu ruce ruci ruel ruer rues rufc rufe ruff ruif ruis rule rull rurc rure ruri rurs ruru ruse rusi russ rusu s-ib s-ic s-ii sbbs sbcc sbcs sbef sber sbfc sbic sbse sbsi sbus scbi sccc scce sccl sccs scec scee scel scer scfc scfe scfi sci- scic scie scif scil scir scis scl- sclc scls scr- scrc scre scri scrs scsc scsi scsl scsr scsu scub scul scur se-c se-e se-f se-i se-s se-u sebe sebi sebs sec- secc sece secr secs secu seeb seec seef seel seer sees seeu seff sefi sefl seie seif seii seil seir seis seiu selb sele self seli sell sels selu serb serc sere serf seri serr sers seru sesc sese sesi sess seui seul seur sfbc sfcc sfcs sfer sffc sflc sfls sfrc sfss sfsu sibc sibe sibi sibs sibu sicc sice sici sics sicu siec sief siel sier sies sife siff sifl sifr sifu sil- silc sile silf sili sill sils silu sirc sire sirf siri sirr sirs siru sisc sise sisi siss sisu siue siui sius sl-i slcc slcu sleb slee sler sles slib slic slie slir slrc slre slrs slsc slsu slub sluc slue slur srbc srcc sreb srec sres srfc srfi srib sris srub ssbr sscc ssce ssci sscs ssec ssee sses ssfc ssfl ssis sslc ssle ssrc ssri ssrl ssrs sssb sssc sssf sssi ssss sub- subb subi subl subs suc- succ suci sucr sucs suee suel suer sues sueu suf- sufc suff sufi sufr sufs sufu suie suir suis sul- sulc sule sulf suli sull sulu sur- surc sure surf suri surr surs suru sus- suse susi suss susu suus u-ie ubbe ubbi uber ubic ubii ubir ubis uble ubli ubls ucbc ucci ucel uces ucfb ucil ucrc ucsb ucsc ucsf ucsu ueir uele ueli uell uers uess ufcu ufel ufer uffe uies uile uirr uise ulbc ulcc uleb ulee ules ulfe ulic ulie ulle ulli ullr ulul ulus urbe urbi urbs urci ure- ures urfe urff urfi urib uric urie urif uris uriu urle urls urre urri urse ursi urss ursu urur urus usbc usbe usbl usbr usbs uscc usce uscf uscs usee usef usel user uses usfc usfi usfl usfs usie usif usis usle uslu ussb ussc usse ussf ussr usss ussu usui usul usus uulu uuri uusi uuuu