b-u bbb bbf bbi bbo bbr bbs bbu bfb bff bfi bfo bfr bfs bfu bfv bi- bib bif bii bio bir bis biu biv bob bof boi boo bor bos bou bov brb brf bri bro brr brs bru brv bsb bsf bsi bso bsr bss bsu bsv bub buf bui buo bur bus buu bvb bvi bvo bvr bvs bvu bvv fbb fbf fbi fbo fbr fbs fbu fff ffi ffo ffr ffs ffu ffv fib fif fii fir fis fiu fob fof foi foo for fos fou frb frf fri fro frr frs fru fsb fsf fsi fso fsr fss fsu fsv fub fuf fui fuo fur fus fuu fuv i-f i-v ibb ibf ibi ibo ibr ibs ibu ibv ifb iff ifi ifo ifr ifs ifu iib iif iii iio iir iis iiu io- iob iof ioi ioo ior ios iou iov ir- irb irf iri iro irr irs iru irv is- isb isf isi iso isr iss isu isv iu- iub iui iur ius ivb ivf ivi ivo ivr ivs ivu ivv o-i ob- obb obf obi obo obr obs obu obv of- ofb off ofi ofo ofr ofs ofu ofv oib oif oii oio oir ois oiu oiv oo- oob oof ooi ooo oor oos oov or- orb orf ori oro orr ors oru orv os- osb osf osi oso osr oss osu osv ou- ouf oui ouo our ous ov- ovb ovf ovi ovo ovs ovv rbb rbf rbi rbo rbr rbs rbu rfb rff rfi rfo rfr rfs rfu rfv rib rif rii rio rir ris riv rob rof roi roo ror ros rou rov rrb rrf rri rrr rrs rru rsb rsf rsi rso rsr rss rsu rsv rub ruf rui ruo rur rus ruu ruv rvb rvf rvi rvo rvr rvs rvu rvv sbb sbf sbi sbo sbr sbs sbu sbv sfb sff sfi sfo sfr sfs sfu sfv sib sif sii sio sir sis siu siv sob sof soi soo sor sos sou sov sr- srb srf sri sro srr srs srv ss- ssb ssf ssi sso ssr sss ssu ssv sub suf sui suo sur sus suu suv svb svf svi svo svr svs svu svv ubb ubf ubi ubo ubr ubs ubu ubv uff ufi ufo ufr ufs ufu ufv uib uif uii uio uir uis uiu uob uoo uor uos ur- urb urf uri uro urr urs uru usb usf usi uso usr uss usu usv uur uus uuu uvb uvf uvo uvs uvu uvv vbi vbo vbr vbs vbv vfb vff vfi vfr vfs vfu vfv vi- vib vif vii vio vir vis viu viv vob vof voi voo vor vos vou vov vrb vrf vri vrr vrs vru vsb vsf vsi vso vsr vss vsu vsv vur vus vuv vvb vvi vvo vvr vvs vvv

-ous bbbb bbbs bffs bfsi bfsr bibb bibi bibo bibs biff bifi biis bio- bioi bios biou birb biri biro birr birs biru bis- biso biss bisu bivi bobb bobi bobo bobs bobu boff bofs bofu boi- boii bois boiu boob boof boor boos bor- borf bori boro borr bors boru bosi boso boss bosu bouf bour bous bovi bovo brfu brio bris brob broo bror bros brou brrr brrs brsb brsr brus bruv brvi bsff bsfs bsos bubb bubi bubo bubs bubu buff bufo bufr buif buir buis buiu bur- burb buri buro burr burs buru busi buss busu buus fbis fbrs fbus ffff ffii ffrr ffss ffvs fibs fiff fifi fifo fiii fior fios firs fisi fiss fisu fivb fobs fofo fois foof foos for- forb fori foro forr fors fosb fosi foso foss four fous fr-v frib frio fris frob fros frou frsb frso frub fsfi fsfo fssf fubb fubs fubu fuff fufu fuir fuor fur- furi furo furr furs fusi fuso fuss fusu fvsu ibfi ibis ibos ibri ibro ibsf ibss ibus ifbb ifis ifor ifrb ifrf ifri ifsb ifso iiii iiio iiis iioi iioo iios iirs iisi iisr iisu iobi ioii ioio ioof iooi iooo ioos iori iors ioso iosu ious irfu iri- irio iris irob irov irri irrs irsf irus irvs isis iso- isof isor isos isri issf issi isso issr isss issu isus iuiu iuss ivbv ivor ivrs obbo obfv obis oboi obor obos obri obro obsr obss obus obvi obvs off- offo offr offs offu ofor ofus oiii oios oisu oobi ooff oofs oooo ooos oosi oous orbb orbi orbo orbs orbu orff orfi orfs orfu ori- orif orio oris oro- orof oror oros orri orro orrs orsi orso orsu orub orus orvr orvs osii osis osoi osoo osor osos osov osro ossb ossi osso ossu oubs ouff ouii ouir ouis our- ouro ours ouu- ovi- ovis ovo- ovoo rbbb rbbr rbbs rbis rbss rib- ribo ribs ribu riff rifs rifu riif riis rios riou riri rirs risi riso riss risu rius rivo rivs rob- robb robi robo robs robu roff rofo roif roio roir rois roiu roob roof rooi roor roos rori roro roru rosi roso ross roub rouf rous rovi rovo rovs rrif rrrr rsbi rsis rsos rubb rubi rubs rubu ruff rufo ruif ruis ruri ruro rurs ruru rusi ruso russ rusu ruvi ruvu s-ib s-ii s-iv s-os sbbs sbor sbsi sbus sfio sfor sfos sfro sfss sfsu sibi sibo sibs sibu siff sifo sifr sifu sior sios siou sirf siri siro sirr sirs siru sisi siss sisu siui sius sivi sobo sobr sobs sobu sofi sofo soif soir sois soof soor soos sorb sori soro sorr sors soru sosi soso soss sosv souf sour sous sovo sovs sovu srfi srib sris sros srub ssbr ssis ssri ssrs sssb sssf sssi ssss sub- subb subi subo subs suf- suff sufi sufr sufs sufu suio suir suis suor suos sur- surf suri suro surr surs suru surv sus- susi suso suss susu suus suvi suvs svir svor ubbi ubbo ubii ubir ubis ubos ufos uirr uofo uor- uovo urbi urbs urff urfi urib urif uris uriu uro- uroo urri