-ol b-u bbb bbe bbi bbl bbo bbs bbu be- beb bee bei bel beo bes beu bi- bib bie bii bil bio bis biu blb ble bli bll blo bls blu bob boe boi bol boo bos bou bsb bse bsi bsl bso bss bsu bub bue bui bul buo bus buu ebb ebe ebi ebl ebo ebs ebu eeb eee eel eeo ees eib eie eii eil eio eis eiu elb ele eli ell elo els elu eo- eob eoe eoi eol eoo eos eou es- esb ese esi esl eso ess esu eu- eub eue eui eul eus ibb ibe ibi ibl ibo ibs ibu ie- iee iei iel ies iib iie iii iil iio iis iiu il- ilb ile ili ill ilo ils ilu io- iob ioe ioi iol ioo ios iou is- isb ise isi isl iso iss isu iu- iub iue iui ius lbb lbe lbi lbl lbo lbs lbu leb lee lei lel leo les leu lib lie lii lil lio lis liu llb lle lli lll llo lls llu lob loe loi lol loo los lou lsb lse lsi lsl lso lss lsu lub lue lui lul luo lus luu o-i ob- obb obe obi obl obo obs obu oeb oee oei oel oeo oes oib oie oii oil oio ois oiu olb ole oli oll olo ols olu oo- oob ooi ool ooo oos os- osb ose osi osl oso oss osu ou- oue oui oul ouo ous sbb sbe sbi sbl sbo sbs sbu se- seb see sei sel seo ses seu sib sie sii sil sio sis siu slb sle sli sll slo sls slu sob soe soi sol soo sos sou ss- ssb sse ssi ssl sso sss ssu sub sue sui sul suo sus suu ubb ube ubi ubl ubo ubs ubu ueb uee uei uel ues uib uie uii uil uio uis uiu ulb ule uli ull ulo uls ulu uob uoe uol uoo uos usb use usi usl uso uss usu uue uus uuu