-ol b-u bbb bbi bbl bbo bbs bbt bbu bi- bib bii bil bio bis bit biu blb bli bll blo bls blt blu bob boi bol boo bos bot bou bsb bsi bsl bso bss bst bsu btb bti btl bto bts btt btu bub bui bul buo bus but buu ibb ibi ibl ibo ibs ibt ibu iib iii iil iio iis iit iiu il- ilb ili ill ilo ils ilt ilu io- iob ioi iol ioo ios iot iou is- isb isi isl iso iss ist isu itb iti itl ito its itt itu iu- iub iui ius iut lbb lbi lbl lbo lbs lbt lbu lib lii lil lio lis lit liu llb lli lll llo lls llt llu lob loi lol loo los lot lou lsb lsi lsl lso lss lst lsu ltb lti ltl lto lts ltt ltu lub lui lul luo lus lut luu o-i ob- obb obi obl obo obs obt obu oib oii oil oio ois oit oiu olb oli oll olo ols olt olu oo- oob ooi ool ooo oos oot os- osb osi osl oso oss ost osu ot- otb oti otl oto ots ott otu ou- oui oul ouo ous out sbb sbi sbl sbo sbs sbt sbu sib sii sil sio sis sit siu slb sli sll slo sls slt slu sob soi sol soo sos sot sou ss- ssb ssi ssl sso sss sst ssu stb sti stl sto sts stt stu sub sui sul suo sus sut suu tbb tbi tbl tbo tbs tbt tbu tib tii til tio tis tit tiu tli tll tlo tls tlt tlu to- tob toi tol too tos tot tou tsb tsi tsl tso tss tst tsu ttb tti ttl tto tts ttt ttu tub tui tul tuo tus tut tuu ubb ubi ubl ubo ubs ubt ubu uib uii uil uio uis uit uiu ulb uli ull ulo uls ult ulu uob uol uoo uos uot usb usi usl uso uss ust usu utb uti utl uto uts utt utu uus uut uuu