-ic b-u bbb bbc bbe bbi bbk bbl bbs bbt bbu bcb bcc bce bci bck bcl bcs bct bcu be- beb bec bee bei bek bel bes bet beu bi- bib bic bie bii bik bil bis bit biu bkb bkc bke bkk bkl bks bkt blb blc ble bli blk bll bls blt blu bsb bsc bse bsi bsk bsl bss bst bsu btb btc bte bti btk btl bts btt btu bub buc bue bui buk bul bus but buu c-- cbb cbc cbe cbi cbk cbl cbs cbt cbu ccb ccc cce cci cck ccl ccs cct ccu ce- ceb cec cee cei cek cel ces cet ceu ci- cib cic cie cii cik cil cis cit ciu ckb ckc cki cks ckt cl- clb clc cle cli clk cll cls clt clu csb csc cse csi csk csl css cst csu ctb ctc cte cti ctk ctl cts ctt ctu cub cuc cue cui cuk cul cus cut cuu ebb ebc ebe ebi ebk ebl ebs ebt ebu ec- ecb ecc ece eci eck ecl ecs ect ecu eeb eec eee eek eel ees eet eib eic eie eii eik eil eis eit eiu ekb ekc eke eki ekl eks ekt eku elb elc ele eli elk ell els elt elu es- esb esc ese esi esk esl ess est esu etb etc ete eti etk etl ets ett etu eu- eub euc eue eui eul eus eut ibb ibc ibe ibi ibk ibl ibs ibt ibu icb icc ice ici ick icl ics ict icu ie- iec iee iei iek iel ies iet iib iic iie iii iil iis iit iiu ikb ikc ike iki ikk ikl iks ikt iku il- ilb ilc ile ili ilk ill ils ilt ilu is- isb isc ise isi isk isl iss ist isu itb itc ite iti itk itl its itt itu iu- iub iuc iue iui ius iut k-t kbb kbc kbe kbi kbk kbl kbs kbu kcb kcc kce kci kck kcl kcs kct kcu ke- keb kec kee kei kek kel kes ket kib kic kie kii kik kil kis kit kiu kkb kkc kke kki kkk kkl kks kkt kku kl- klb klc kli kls klt klu ksb ksc kse ksi ksk ksl kss kst ksu ktb ktc kte ktk ktl kts ktt ktu kub kuc kue kui kuk kul kus kut kuu lbb lbc lbe lbi lbk lbl lbs lbt lbu lcb lcc lce lci lck lcl lcs lct lcu leb lec lee lei lek lel les let leu lib lic lie lii lik lil lis lit liu lkb lkl lks lkt llb llc lle lli llk lll lls llt llu lsb lsc lse lsi lsk lsl lss lst lsu ltb ltc lte lti ltk ltl lts ltt ltu lub luc lue lui luk lul lus lut luu sbb sbc sbe sbi sbk sbl sbs sbt sbu scb scc sce sci sck scl scs sct scu se- seb sec see sei sek sel ses set seu sib sic sie sii sik sil sis sit siu sk- skb skc ske ski skk skl sks skt sku slb slc sle sli slk sll sls slt slu ss- ssb ssc sse ssi ssk ssl sss sst ssu stb stc ste sti stk stl sts stt stu sub suc sue sui suk sul sus sut suu tbb tbc tbe tbi tbk tbl tbs tbt tbu tcb tcc tce tci tck tcl tcs tct tcu te- teb tec tee tei tek tel tes tet teu tib tic tie tii tik til tis tit tiu tkb tkc tke tkk tkl tks tkt tlc tle tli tlk tll tls tlt tlu tsb tsc tse tsi tsk tsl tss tst tsu ttb ttc tte tti ttk ttl tts ttt ttu tub tuc tue tui tuk tul tus tut tuu ubb ubc ube ubi ubk ubl ubs ubt ubu ucb ucc uce uci uck ucl ucs uct ucu ueb uec uee uei uel ues uet uib uic uie uii uil uis uit uiu ukb ukc uke uki ukk ukl uku ulb ulc ule uli ulk ull uls ult ulu usb usc use usi usk usl uss ust usu utb utc ute uti utk utl uts utt utu uuc uue uus uut uuu