-ic b-u bbb bbc bbe bbi bbk bbl bbt bbu bcb bcc bce bci bck bcl bct bcu be- beb bec bee bei bek bel bet beu bi- bib bic bie bii bik bil bit biu bkb bkc bke bkk bkl bkt blb blc ble bli blk bll blt blu btb btc bte bti btk btl btt btu bub buc bue bui buk bul but buu c-- cbb cbc cbe cbi cbk cbl cbt cbu ccb ccc cce cci cck ccl cct ccu ce- ceb cec cee cei cek cel cet ceu ci- cib cic cie cii cik cil cit ciu ckb ckc cki ckt cl- clb clc cle cli clk cll clt clu ctb ctc cte cti ctk ctl ctt ctu cub cuc cue cui cuk cul cut cuu ebb ebc ebe ebi ebk ebl ebt ebu ec- ecb ecc ece eci eck ecl ect ecu eeb eec eee eek eel eet eib eic eie eii eik eil eit eiu ekb ekc eke eki ekl ekt eku elb elc ele eli elk ell elt elu etb etc ete eti etk etl ett etu eu- eub euc eue eui eul eut ibb ibc ibe ibi ibk ibl ibt ibu icb icc ice ici ick icl ict icu ie- iec iee iei iek iel iet iib iic iie iii iil iit iiu ikb ikc ike iki ikk ikl ikt iku il- ilb ilc ile ili ilk ill ilt ilu itb itc ite iti itk itl itt itu iu- iub iuc iue iui iut k-t kbb kbc kbe kbi kbk kbl kbu kcb kcc kce kci kck kcl kct kcu ke- keb kec kee kei kek kel ket kib kic kie kii kik kil kit kiu kkb kkc kke kki kkk kkl kkt kku kl- klb klc kli klt klu ktb ktc kte ktk ktl ktt ktu kub kuc kue kui kuk kul kut kuu lbb lbc lbe lbi lbk lbl lbt lbu lcb lcc lce lci lck lcl lct lcu leb lec lee lei lek lel let leu lib lic lie lii lik lil lit liu lkb lkl lkt llb llc lle lli llk lll llt llu ltb ltc lte lti ltk ltl ltt ltu lub luc lue lui luk lul lut luu tbb tbc tbe tbi tbk tbl tbt tbu tcb tcc tce tci tck tcl tct tcu te- teb tec tee tei tek tel tet teu tib tic tie tii tik til tit tiu tkb tkc tke tkk tkl tkt tlc tle tli tlk tll tlt tlu ttb ttc tte tti ttk ttl ttt ttu tub tuc tue tui tuk tul tut tuu ubb ubc ube ubi ubk ubl ubt ubu ucb ucc uce uci uck ucl uct ucu ueb uec uee uei uel uet uib uic uie uii uil uit uiu ukb ukc uke uki ukk ukl uku ulb ulc ule uli ulk ull ult ulu utb utc ute uti utk utl utt utu uuc uue uut uuu