bbbb bbbs bblb bbls bbrg bggs bibb bibi bibl bibs bigb bigg bigs bigu biis bili bill bils bilu birb birg biri birl birr birs biru bis- bisl biss bisu blir blis blls blrg blss blub blur blus brig bril bris brls brrr brrs brsb brsr brug brus bsgs bubb bubi bubs bubu bugg bugi bugs buir buis buiu bulb bulg buli bull buls bulu bur- burb burg buri burl burr burs buru busi buss busu buus gbbs gggg ggss gibb gibs gigg gigi gigs giis gilg gili gill gils girg giri girl girr girs giru giss giur gius gli- glib glis glrb glub glug glui glur grbr grib grig gril gris grrl grrr grrs grss grub grug grui grur grus gsis gsli gsur gubb gubi gubs gubu gugb gugg gugi gugu guib guil guis gulb guli gull guls gulu gurb gurg guri gurl gurr gurs guru gusb guss guus ibis ibri ibss ibus iggs igil igis igli iglu igri igus iiii iiis iirs iisi iisr iisu ilir ilis ill- illi ills ilus irgs iri- irig iril iris irlb irri irrs irsg irul irus isbl isil isis isls isrg isri issi issr isss issu isus iugs iuiu iuss lblr lbrs lbug lgbu libr libs libu ligg ligi liig liii liir liis lilb lilg lili lill lils lilu lirg liri lirl lirr lirs liru lisi liss lisu lius llbs llll lrgb lrrr ls-r lsbu lssr lubs lugg lugi lugs lugu luis luli lull lulu lurg luri lurs lusi luss rbbb rbbr rbbs rbis rbsl rbss rgbi rib- ribs ribu rigg rigi rigs rigu riis rill rilu riri rirs risi riss risu rius rlls rlug rrrr rsbi rsgb rsis rssl rubb rubi rubs rubu rugg rugi rugs ruis rull ruri rurs ruru rusi russ rusu s-ib s-ii sbbs sbig sbsi sbus sggg sggs sglr sgls sgss sibi sibs sibu sigg sigi sigs sil- sili sill sils silu siri sirr sirs siru sisi siss sisu siui sius sl-i slib slig slir slrs slsu slub slug slur srgb srib sris srub ssbr ssgs ssis ssrg ssri ssrl ssrs sssb sssi ssss sub- subb subg subi subl subs sug- sugg sugi suig suir suis sul- suli sull sulu sur- surg suri surr surs suru sus- susi suss susu suus ubbi ubii ubir ubis ubli ubls uggs ugis ugli ugri ugur uguu uirr ulli ullr ulul ulus urbi urbs urgi urgu urib uris uriu urls urri ursi urss ursu urur urus usbl usbr usbs usis uslu ussb ussr usss ussu usui usul usus uulu uuri uusi uuuu