-ol b-u bbb bbc bbd bbe bbk bbl bbo bbu bcb bcc bcd bce bck bcl bco bcu bdb bdc bdd bde bdk bdl bdo bdu be- beb bec bed bee bek bel beo beu bkb bkc bke bkk bkl bko blb blc bld ble blk bll blo blu bob boc bod boe bok bol boo bou bub buc bud bue buk bul buo buu c-- cbb cbc cbd cbe cbk cbl cbo cbu ccb ccc ccd cce cck ccl cco ccu cdb cdc cdd cde cdk cdl cdo cdu ce- ceb cec ced cee cek cel ceo ceu ckb ckc ckd cko cl- clb clc cld cle clk cll clo clu co- cob coc cod coe cok col coo cou cub cuc cud cue cuk cul cuo cuu dbb dbc dbd dbe dbk dbl dbo dbu dcb dcc dcd dce dck dcl dco dcu ddb ddc ddd dde ddk ddl ddo ddu de- deb dec ded dee dek del deo deu dkb dkc dke dkk dkl dko dku dl- dlb dlc dld dle dlk dll dlo dlu dob doc dod doe dok dol doo dou dub duc dud due duk dul duo ebb ebc ebd ebe ebk ebl ebo ebu ec- ecb ecc ecd ece eck ecl eco ecu ed- edb edc edd ede edk edl edo edu eeb eec eed eee eek eel eeo ekb ekc ekd eke ekl eko eku elb elc eld ele elk ell elo elu eo- eob eoc eod eoe eok eol eoo eou eu- eub euc eud eue eul kbb kbc kbd kbe kbk kbl kbo kbu kcb kcc kcd kce kck kcl kcu kdb kdc kde kdk kdl kdo kdu ke- keb kec ked kee kek kel keo kkb kkc kke kkk kkl kku kl- klb klc kld klo klu kob koc kod koe kok kol koo kou kub kuc kud kue kuk kul kuu lbb lbc lbd lbe lbk lbl lbo lbu lcb lcc lcd lce lck lcl lco lcu ldb ldc ldd lde ldk ldl ldo ldu leb lec led lee lek lel leo leu lkb lkl llb llc lld lle llk lll llo llu lob loc lod loe lok lol loo lou lub luc lud lue luk lul luo luu ob- obb obc obd obe obk obl obo obu oc- ocb occ ocd ock ocl oco ocu odb odc odd ode odl odo odu oeb oec oed oee oel oeo okb okc okd oke okk okl oko oku olb olc old ole olk oll olo olu oo- oob ooc ood ook ool ooo ou- ouc oud oue ouk oul ouo ubb ubc ube ubk ubl ubo ubu ucb ucc ucd uce uck ucl uco ucu udb udc udd ude udk udl udo udu ueb uec ued uee uel ukb ukc uke ukk ukl uku ulb ulc uld ule ulk ull ulo ulu uob uoc uod uoe uok uol uoo uuc uue uuu