bbbb bbbs bblb bbls bbpr bibb bibi bibl bibo bibs biis bili bill bilo bils bio- bioi biol bios bipp bips birb biri birl biro birr birs bis- bisl biso bisp biss blio blip blir blis blls blob bloo blop blsp blss bobb bobi bobo bobs boi- boii boil bois boli boll bolo bols boob bool boop boor boos bopp bops bor- bori boro borr bors bosi boso boss bril brio bris brlp brls brob brol broo bror bros brrr brrs brsb brsr bsos bspp bspr ibis ibos ibri ibro ibss iiii iiio iiis iioi iioo iiop iios iirs iisi iisp iisr ilio ilir ilis ill- illi illo illp ills iloo ilos ilpr iobi ioii ioio iolo iooi iooo ioos iopl iops iori iors ioso ipil iplo ipop ipos ippo ippr ipri ipsi ipso ipsp ipss irbp iri- iril irio irip iris irlb irob irop irps irri irrs irsp isbl isil isis isls iso- isol isop isor isos ispr isps isri isrp issi isso issp issr isss lblr lbos lbrs libo libr libs liii liir liis lilb lili lill lilo lils lio- lior lios lip- lipb lipi lipl lipo lipp lips liri lirl liro lirp lirr lirs lisi liso lisp liss llbs llll lloo llps lob- lobb lobi lobo lobs loir lois loli loll lolo lols loob lool loop loor loos lopi lopp lops lori loro lors losi loso losp loss lppl lprp lpss lroi lrps lrrr ls-r lspl lspr lsso lssp lssr obbo obis obls oboi obol obor obos obri obro obsr obss oiii oils oios olbo olib olio olis olli ollo olor olos olsi oobi oolo oooo ooos oops oosi opii opio opis opls opo- opor opos oppi oppo opps opsi orbb orbi orbo orbs ori- oril orio oris orlo oro- oror oros orpi orps orri orro orrs orsi orso osbp osii osip osis osli oslo osoi osoo osor osos osro ossb ossi osso pbil pbrs pbsp pibb pibi piip pil- pili pill pilo pils piob pipi pipo pipp pips piri pirl piro pirr pirs pisi piso piss plbr plib plio plip plis plob ploo plop plos plpp plri plsi plss pobo pobs poil poio pois poli poll polo pols pool poop poor poos pop- popi popo popp pops porb pori poro porr pors posb posi poso poss ppib ppli pplo ppos pppo pppp ppps ppss prbs pri- prii pris prlr prls pro- prob prol proo prop pros prps prri prrs prsi prsl prso prss psbr psil psip psis psoi psol psos pspi pspp pspr psps psrp psso rbbb rbbr rbbs rbis rbsl rbsp rbss rib- ribo ribs riis rill rilo rilp riol rios ripi ripl ripp ripr rips riri rirs risi riso risp riss rlls rob- robb robi robo robs roil roio roir rois roll rolo rolp roob rooi rool roop roor roos ropo rops rori roro rosi roso rosp ross rpii rpls rpob rpos rpps rrrr rrsp rsbi rsis rslp rsos rspb rspo rsps rssl s-ib s-ii s-os sbbs sbor sbsi sbsp sibi sibo sibs sil- sili sill silo sils siol siop sior sios sipi sipo sipp sips siri siro sirp sirr sirs sisi siss sl-i slbp slib slip slir sllp slob sloo slop slos slpi slpp slps slrp slrs sobo sobp sobr sobs soil soir sois soli soll solo solp solr sols sool soop soor soos sopi sopo sopp sops sorb sori soro sorr sors sosi soso soss spib spio spip spir spis splo splp splr spls spoo spop spor spos spps spri spro sprs spso spsp spss srib sris sros srps srsp ssbr ssis sslp ssop sspl sspo ssps ssri ssrl ssrs sssb sssi ssss