b-u bbb bbc bbd bbe bbk bbl bbn bbu bcb bcc bcd bce bck bcl bcn bcu bdb bdc bdd bde bdk bdl bdu be- beb bec bed bee bek bel ben beu bkb bkc bke bkk bkl bkn blb blc bld ble blk bll bln blu bnb bnc bnd bne bnk bnl bnn bnu bub buc bud bue buk bul bun buu c-- cbb cbc cbd cbe cbk cbl cbn cbu ccb ccc ccd cce cck ccl ccn ccu cdb cdc cdd cde cdk cdl cdn cdu ce- ceb cec ced cee cek cel cen ceu ckb ckc ckd cl- clb clc cld cle clk cll cln clu cn- cnb cnc cnd cne cnl cnn cnu cub cuc cud cue cuk cul cun cuu dbb dbc dbd dbe dbk dbl dbn dbu dcb dcc dcd dce dck dcl dcn dcu ddb ddc ddd dde ddk ddl ddn ddu de- deb dec ded dee dek del den deu dkb dkc dke dkk dkl dku dl- dlb dlc dld dle dlk dll dlu dnb dnc dnd dne dnk dnl dnn dub duc dud due duk dul dun ebb ebc ebd ebe ebk ebl ebn ebu ec- ecb ecc ecd ece eck ecl ecn ecu ed- edb edc edd ede edk edl edn edu eeb eec eed eee eek eel een ekb ekc ekd eke ekl eku elb elc eld ele elk ell eln elu en- enb enc end ene enk enl enn enu eu- eub euc eud eue eul eun kbb kbc kbd kbe kbk kbl kbn kbu kcb kcc kcd kce kck kcl kcn kcu kdb kdc kde kdk kdl kdu ke- keb kec ked kee kek kel ken kkb kkc kke kkk kkl kkn kku kl- klb klc kld klu kn- knc knd kne knk knl knn knu kub kuc kud kue kuk kul kun kuu lbb lbc lbd lbe lbk lbl lbu lcb lcc lcd lce lck lcl lcn lcu ldb ldc ldd lde ldk ldl ldn ldu leb lec led lee lek lel len leu lkb lkl llb llc lld lle llk lll lln llu lnb lnc lnd lne lnk lnl lnn lnu lub luc lud lue luk lul lun luu nbb nbc nbd nbe nbk nbl nbn nbu ncb ncc ncd nce nck ncl ncn ncu ndb ndc ndd nde ndk ndl ndn ndu ne- neb nec ned nee nek nel nen neu nkc nke nkk nkn nku nlb nlc nld nle nlk nll nln nlu nnb nnc nne nnk nnl nnn nnu nub nuc nud nue nuk nul nun nuu ubb ubc ube ubk ubl ubn ubu ucb ucc ucd uce uck ucl ucn ucu udb udc udd ude udk udl udn udu ueb uec ued uee uel uen ukb ukc uke ukk ukl ukn uku ulb ulc uld ule ulk ull uln ulu un- unb unc und une unk unl unn unu uuc uue uun uuu