-er -ic b-u bbb bbc bbe bbi bbk bbl bbq bbr bbs bbu bcb bcc bce bci bck bcl bcq bcr bcs bcu be- beb bec bee bei bek bel beq ber bes beu bi- bib bic bie bii bik bil bir bis biu bkb bkc bke bkk bkl bkq bkr bks blb blc ble bli blk bll blq blr bls blu bqc bqe brb bre bri brk brl brq brr brs bru bsb bsc bse bsi bsk bsl bsr bss bsu bub buc bue bui buk bul bur bus buu c-- cbb cbc cbe cbi cbk cbl cbq cbr cbs cbu ccb ccc cce cci cck ccl ccr ccs ccu ce- ceb cec cee cei cek cel ceq cer ces ceu ci- cib cic cie cii cik cil ciq cir cis ciu ckb ckc cki cks cl- clb clc cle cli clk cll clr cls clu cqb cqc cqi cql cqs crb crc cre cri crk crl crq crr crs cru csb csc cse csi csk csl csq csr css csu cub cuc cue cui cuk cul cuq cur cus cuu ebb ebc ebe ebi ebk ebl ebq ebr ebs ebu ec- ecb ecc ece eci eck ecl ecq ecr ecs ecu eeb eec eee eek eel eer ees eib eic eie eii eik eil eir eis eiu ekb ekc eke eki ekl ekr eks eku elb elc ele eli elk ell elr els elu eqe eqq eqs equ erb erc ere eri erk erl erq err ers eru es- esb esc ese esi esk esl esq esr ess esu eu- eub euc eue eui eul eur eus ibb ibc ibe ibi ibk ibl ibr ibs ibu icb icc ice ici ick icl icq icr ics icu ie- iec iee iei iek iel ier ies iib iic iie iii iil iir iis iiu ikb ikc ike iki ikk ikl ikr iks iku il- ilb ilc ile ili ilk ill ilq ilr ils ilu iqc iqe iqs iqu ir- irb irc ire iri irk irl irq irr irs iru is- isb isc ise isi isk isl isq isr iss isu iu- iub iuc iue iui iur ius kbb kbc kbe kbi kbk kbl kbr kbs kbu kcb kcc kce kci kck kcl kcr kcs kcu ke- keb kec kee kei kek kel ker kes kib kic kie kii kik kil kir kis kiu kkb kkc kke kki kkk kkl kkr kks kku kl- klb klc kli klq klr kls klu kql krc kri krk krl krr krs kru ksb ksc kse ksi ksk ksl ksr kss ksu kub kuc kue kui kuk kul kur kus kuu lbb lbc lbe lbi lbk lbl lbr lbs lbu lcb lcc lce lci lck lcl lcq lcr lcs lcu leb lec lee lei lek lel leq ler les leu lib lic lie lii lik lil liq lir lis liu lkb lkl lkr lks llb llc lle lli llk lll llq llr lls llu lqr lrb lrc lri lrk lrr lrs lru lsb lsc lse lsi lsk lsl lsq lsr lss lsu lub luc lue lui luk lul lur lus luu qbc qbe qbq qbs qcc qci qcl qcs qec qee qic qie qik qil qir qis qiu qki qls qqk qqq qqu qrb qrc qre qri qrl qrs qru qsc qsi qsl qsr qu- que qui qul qur qus rbb rbc rbe rbi rbk rbl rbr rbs rbu rcb rcc rce rci rcl rcr rcs rcu re- reb rec ree rei rek rel req rer res reu rib ric rie rii rik ril riq rir ris rkb rkc rke rkk rks rku rlc rle rli rll rlr rls rlu rqc rqs rrb rrc rri rrk rrl rrq rrr rrs rru rsb rsc rse rsi rsk rsl rsq rsr rss rsu rub ruc rue rui ruk rur rus ruu sbb sbc sbe sbi sbk sbl sbq sbr sbs sbu scb scc sce sci sck scl scr scs scu se- seb sec see sei sek sel seq ser ses seu sib sic sie sii sik sil siq sir sis siu sk- skb skc ske ski skk skl skq skr sks sku slb slc sle sli slk sll slq slr sls slu sqi sql sqq sqr sqs sr- srb src sre sri srk srl srq srr srs ss- ssb ssc sse ssi ssk ssl ssq ssr sss ssu sub suc sue sui suk sul suq sur sus suu ubb ubc ube ubi ubk ubl ubr ubs ubu ucb ucc uce uci uck ucl ucr ucs ucu ueb uec uee uei uel uer ues uib uic uie uii uil uiq uir uis uiu ukb ukc uke uki ukk ukl ukr uku ulb ulc ule uli ulk ull ulr uls ulu ur- urb urc ure uri urk url urr urs uru usb usc use usi usk usl usr uss usu uuc uue uur uus uuu