-ol b-u bbb bbi bbl bbo bbs bbu bi- bib bii bil bio bis biu biv blb bli bll blo bls blu blv bob boi bol boo bos bou bov bsb bsi bsl bso bss bsu bsv bub bui bul buo bus buu bvb bvi bvl bvo bvs bvu bvv i-v ibb ibi ibl ibo ibs ibu ibv iib iii iil iio iis iiu il- ilb ili ill ilo ils ilu ilv io- iob ioi iol ioo ios iou iov is- isb isi isl iso iss isu isv iu- iub iui ius ivb ivi ivl ivo ivs ivu ivv lbb lbi lbl lbo lbs lbu lbv lib lii lil lio lis liu liv llb lli lll llo lls llu llv lob loi lol loo los lou lov lsb lsi lsl lso lss lsu lsv lub lui lul luo lus luu luv lvb lvi lvl lvs lvv o-i ob- obb obi obl obo obs obu obv oib oii oil oio ois oiu oiv olb oli oll olo ols olu oo- oob ooi ool ooo oos oov os- osb osi osl oso oss osu osv ou- oui oul ouo ous ov- ovb ovi ovl ovo ovs ovv sbb sbi sbl sbo sbs sbu sbv sib sii sil sio sis siu siv slb sli sll slo sls slu slv sob soi sol soo sos sou sov ss- ssb ssi ssl sso sss ssu ssv sub sui sul suo sus suu suv svb svi svl svo svs svu svv ubb ubi ubl ubo ubs ubu ubv uib uii uil uio uis uiu ulb uli ull ulo uls ulu ulv uob uol uoo uos usb usi usl uso uss usu usv uus uuu uvb uvl uvo uvs uvu uvv vbi vbl vbo vbs vbv vi- vib vii vil vio vis viu viv vl- vlb vll vlo vls vlv vob voi vol voo vos vou vov vsb vsi vsl vso vss vsu vsv vul vus vuv vvb vvi vvo vvs vvv