bbbb bbbs bblb bbls bffl bffs bfsi bibb bibi bibl bibs biff bifi biis bili bill bils bilu bis- bisl biss bisu bixi blis blix blls blss blub bluf blus bsff bsfs bsix bubb bubi bubs bubu buff buif buis buiu buix bulb buli bull buls bulu busi buss busu busx buus fbis fbus ffff ffii ffss fibs fiff fifi fiii fiil fili fill fils fisi fiss fisu fixx flii flis flix flub fluf flus flux fsfi fsix fssf fubb fubs fubu fuff fufu fuil fuli full fuls fulu fusi fuss fusu fuxi fuxl ibfi ibis ibsf ibss ibus ifbb ifil ifis ifsb iiii iiis iisi iisu ilbx ilis ill- illi ills ilus ilxx isbl isbx isil isis isls issf issi isss issu isus iuiu iuss ixil ixlu ixxi libs libu libx liff lifl lifx liii liis lilb lili lill lils lilu lisi liss lisu liuf lius lixi lixu llbs llll lsbu lubs luff lufu luif luis luli lull lulu lusi luss luxi lxii lxis lxxi lxxx s-ib s-ii sbbs sbsi sbus sfls sfss sfsu sibi sibs sibu siff sifl sifu sil- silf sili sill sils silu sisi siss sisu siui sius sixx sl-i slib slsu slub ssfl ssis sssb sssf sssi ssss sub- subb subi subl subs suf- suff sufi sufs sufu suis sul- sulf suli sull sulu sus- susi suss susu suus sux- sxbl ubbi ubii ubis ubli ubls ufxs ulli ulul ulus usbl usbs usfi usfl usfs usif usis usix uslu ussb ussf usss ussu usui usul usus uulu uusi uuuu uxul uxus x-fi xibu xiii xil- xili xill xisi xixi xlib xlii xlix xsil xuxu xxii xxix xxxi xxxx