-ic b-u bbb bbc bbd bbi bbk bbl bbu bcb bcc bcd bci bck bcl bcu bdb bdc bdd bdi bdk bdl bdu bi- bib bic bid bii bik bil biu bkb bkc bkk bkl blb blc bld bli blk bll blu bub buc bud bui buk bul buu c-- cbb cbc cbd cbi cbk cbl cbu ccb ccc ccd cci cck ccl ccu cdb cdc cdd cdi cdk cdl cdu ci- cib cic cid cii cik cil ciu ckb ckc ckd cki cl- clb clc cld cli clk cll clu cub cuc cud cui cuk cul cuu dbb dbc dbd dbi dbk dbl dbu dcb dcc dcd dci dck dcl dcu ddb ddc ddd ddi ddk ddl ddu di- dib dic did dii dik dil diu dkb dkc dki dkk dkl dku dl- dlb dlc dld dli dlk dll dlu dub duc dud dui duk dul i-d ibb ibc ibd ibi ibk ibl ibu icb icc icd ici ick icl icu idb idc idd idi idk idl idu iib iic iid iii iil iiu ikb ikc iki ikk ikl iku il- ilb ilc ild ili ilk ill ilu iu- iub iuc iud iui kbb kbc kbd kbi kbk kbl kbu kcb kcc kcd kci kck kcl kcu kdb kdc kdk kdl kdu kib kic kid kii kik kil kiu kkb kkc kki kkk kkl kku kl- klb klc kld kli klu kub kuc kud kui kuk kul kuu lbb lbc lbd lbi lbk lbl lbu lcb lcc lcd lci lck lcl lcu ldb ldc ldd ldi ldk ldl ldu lib lic lid lii lik lil liu lkb lkl llb llc lld lli llk lll llu lub luc lud lui luk lul luu ubb ubc ubi ubk ubl ubu ucb ucc ucd uci uck ucl ucu udb udc udd udi udk udl udu uib uic uid uii uil uiu ukb ukc uki ukk ukl uku ulb ulc uld uli ulk ull ulu uuc uuu