bbbb bbdd bbdo bblb bbpr bd-r bdii bibb bibi bibl bibo bidi bido bidr bild bili bill bilo bio- bioi biol bipp birb bird biri birl biro birr bldr blio blip blir blob blod bloo blop bobb bobi bobo bodb bodi bodo boi- boid boii boil bold boli boll bolo boob bood bool boop boor bopp bor- bord bori boro borr bprd brdo brid bril brio brlp brob brod brol broo bror brrr d-bo dblp dbpd dddd ddpo dibb dibo dibp didi dido diii dili dill dilo diol diop dior dipl dipo dipp dird dirl dirr dlbd dlib dlii dlil dobb dobi dobl dod- dodd dodi dodo doid doil dold doli doll dolo dolp doob dood dool doop door dopo dopp dopr dord dori doro dorp dorr dpll drib dril drip drob drod drol drop ibdo ibid ibrd ibri ibro iddo idid idil idio idir idli idol idro iiii iiio iioi iioo iiop ilio ilir ill- illd illi illo illp iloo ilpr iobi iod- iodd iodo ioii ioio iolo iooi iooo iopl iori ipdi ipid ipil iplo ipod ipop ippo ippr ipri irbp irdo irdp iri- irid iril irio irip irlb irob irod irop irri lblr lddp libo libr lidb lidl lido liii liir lilb lili lill lilo lio- liod lior lip- lipb lipi lipl lipo lipp lird liri lirl liro lirp lirr lldb lldp llll llod lloo lob- lobb lobi lobo lodi loid loir lold loli loll lolo loob lood lool loop loor lopi lopp lord lori loro lpod lppl lprp lrdd lroi lrrr obbo obid oboi obol obor obri obro odbo oddd oddi odio odir odoo odop odor odrl odrp oido oiii olbo oldb olib olid olio olli ollo olor oobi oodi ooid oold oolo oooo oord opii opio opo- opor oppi oppo orbb orbi orbo ordo ori- orid oril orio orlo oro- oror orpi orri orro pbil pdpr pibb pibi pido piip pil- pild pili pill pilo piob pipi pipo pipp piri pirl piro pirr plbr plib plid plio plip plob plod ploo plop plpp plri pobo pod- podd podi podo poid poil poio pold poli poll polo pood pool poop poor pop- popi popo popp porb pori poro porr ppib ppid ppli pplo ppod pppd pppo pppp pri- prid prii prlr pro- prob prod prol proo prop prpd prrd prri rbbb rbbr rdbp rdio rib- ribo ridd ridi rido rill rilo rilp riol ripd ripi ripl ripp ripr riri rob- robb robi robo rodd rodi rodo roid roil roio roir rold roll rolo rolp roob rood rooi rool roop roor ropo rori roro rpdp rpii rpob rrrr