-ol b-u bbb bbf bbi bbl bbo bbs bbt bbu bfb bff bfi bfl bfo bfs bft bfu bi- bib bif bii bil bio bis bit biu blb blf bli bll blo bls blt blu bob bof boi bol boo bos bot bou bsb bsf bsi bsl bso bss bst bsu btb btf bti btl bto bts btt btu bub buf bui bul buo bus but buu fbb fbf fbi fbl fbo fbs fbt fbu fff ffi ffl ffo ffs fft ffu fib fif fii fil fis fit fiu flb flf fli fll flo fls flt flu fob fof foi fol foo fos fot fou fsb fsf fsi fsl fso fss fst fsu ftb ftf fti ftl fto fts ftt ftu fub fuf fui ful fuo fus fut fuu i-f ibb ibf ibi ibl ibo ibs ibt ibu ifb iff ifi ifl ifo ifs ift ifu iib iif iii iil iio iis iit iiu il- ilb ilf ili ill ilo ils ilt ilu io- iob iof ioi iol ioo ios iot iou is- isb isf isi isl iso iss ist isu itb itf iti itl ito its itt itu iu- iub iui ius iut lbb lbf lbi lbl lbo lbs lbt lbu lfb lff lfi lfl lfo lfs lft lfu lib lif lii lil lio lis lit liu llb llf lli lll llo lls llt llu lob lof loi lol loo los lot lou lsb lsf lsi lsl lso lss lst lsu ltb ltf lti ltl lto lts ltt ltu lub luf lui lul luo lus lut luu o-i ob- obb obf obi obl obo obs obt obu of- ofb off ofi ofl ofo ofs oft ofu oib oif oii oil oio ois oit oiu olb olf oli oll olo ols olt olu oo- oob oof ooi ool ooo oos oot os- osb osf osi osl oso oss ost osu ot- otb otf oti otl oto ots ott otu ou- ouf oui oul ouo ous out sbb sbf sbi sbl sbo sbs sbt sbu sfb sff sfi sfl sfo sfs sft sfu sib sif sii sil sio sis sit siu slb slf sli sll slo sls slt slu sob sof soi sol soo sos sot sou ss- ssb ssf ssi ssl sso sss sst ssu stb stf sti stl sto sts stt stu sub suf sui sul suo sus sut suu tbb tbf tbi tbl tbo tbs tbt tbu tfb tff tfi tfl tfo tfs tft tfu tib tif tii til tio tis tit tiu tlf tli tll tlo tls tlt tlu to- tob tof toi tol too tos tot tou tsb tsf tsi tsl tso tss tst tsu ttb ttf tti ttl tto tts ttt ttu tub tuf tui tul tuo tus tut tuu ubb ubf ubi ubl ubo ubs ubt ubu uff ufi ufl ufo ufs uft ufu uib uif uii uil uio uis uit uiu ulb ulf uli ull ulo uls ult ulu uob uol uoo uos uot usb usf usi usl uso uss ust usu utb utf uti utl uto uts utt utu uus uut uuu