-ic b-u bbb bbc bbd bbe bbi bbk bbl bbu bcb bcc bcd bce bci bck bcl bcu bdb bdc bdd bde bdi bdk bdl bdu be- beb bec bed bee bei bek bel beu bi- bib bic bid bie bii bik bil biu bkb bkc bke bkk bkl blb blc bld ble bli blk bll blu bub buc bud bue bui buk bul buu c-- cbb cbc cbd cbe cbi cbk cbl cbu ccb ccc ccd cce cci cck ccl ccu cdb cdc cdd cde cdi cdk cdl cdu ce- ceb cec ced cee cei cek cel ceu ci- cib cic cid cie cii cik cil ciu ckb ckc ckd cki cl- clb clc cld cle cli clk cll clu cub cuc cud cue cui cuk cul cuu dbb dbc dbd dbe dbi dbk dbl dbu dcb dcc dcd dce dci dck dcl dcu ddb ddc ddd dde ddi ddk ddl ddu de- deb dec ded dee dei dek del deu di- dib dic did die dii dik dil diu dkb dkc dke dki dkk dkl dku dl- dlb dlc dld dle dli dlk dll dlu dub duc dud due dui duk dul ebb ebc ebd ebe ebi ebk ebl ebu ec- ecb ecc ecd ece eci eck ecl ecu ed- edb edc edd ede edi edk edl edu eeb eec eed eee eek eel eib eic eid eie eii eik eil eiu ekb ekc ekd eke eki ekl eku elb elc eld ele eli elk ell elu eu- eub euc eud eue eui eul i-d ibb ibc ibd ibe ibi ibk ibl ibu icb icc icd ice ici ick icl icu idb idc idd ide idi idk idl idu ie- iec ied iee iei iek iel iib iic iid iie iii iil iiu ikb ikc ike iki ikk ikl iku il- ilb ilc ild ile ili ilk ill ilu iu- iub iuc iud iue iui kbb kbc kbd kbe kbi kbk kbl kbu kcb kcc kcd kce kci kck kcl kcu kdb kdc kde kdk kdl kdu ke- keb kec ked kee kei kek kel kib kic kid kie kii kik kil kiu kkb kkc kke kki kkk kkl kku kl- klb klc kld kli klu kub kuc kud kue kui kuk kul kuu lbb lbc lbd lbe lbi lbk lbl lbu lcb lcc lcd lce lci lck lcl lcu ldb ldc ldd lde ldi ldk ldl ldu leb lec led lee lei lek lel leu lib lic lid lie lii lik lil liu lkb lkl llb llc lld lle lli llk lll llu lub luc lud lue lui luk lul luu ubb ubc ube ubi ubk ubl ubu ucb ucc ucd uce uci uck ucl ucu udb udc udd ude udi udk udl udu ueb uec ued uee uei uel uib uic uid uie uii uil uiu ukb ukc uke uki ukk ukl uku ulb ulc uld ule uli ulk ull ulu uuc uue uuu