bbbb bbdd bblb bd-r bdii bffl bibb bibi bibl bidi bidr biff bifi bild bili bill birb bird biri birl birr bldr blir brid bril brrr dddd dfrf dfri dibb didi dif- diff diii dilf dili dill dird dirl dirr dlbd dlib dlii dlil drib drif dril fdlr ffff ffii ffrr fidf fiff fifi fiii fiil fild fili fill fldr flid flii frib frid fril ibfi ibid ibrd ibri idid idil idir idli idrf ifbb ifid ifil ifrb ifrf ifri iiii ilir ill- illd illi iri- irid iril irlb irri lblr ldif lfrd libr lidb lidl liff lifl liii liir lilb lili lill lird liri lirl lirr lldb llll lrdd lrif lrrr rbbb rbbr rfdi rffl rfid rib- ridd ridi riff riif rill riri rlif rrif rrrr