-er -ic b-u bbb bbc bbe bbi bbk bbl bbm bbr bbs bbt bbu bcb bcc bce bci bck bcl bcm bcr bcs bct bcu be- beb bec bee bei bek bel bem ber bes bet beu bi- bib bic bie bii bik bil bim bir bis bit biu bkb bkc bke bkk bkl bkm bkr bks bkt blb blc ble bli blk bll blm blr bls blt blu bmb bmc bme bmi bmk bml bmm bmr bms bmt bmu brb bre bri brk brl brm brr brs brt bru bsb bsc bse bsi bsk bsl bsm bsr bss bst bsu btb btc bte bti btk btl btm btr bts btt btu bub buc bue bui buk bul bum bur bus but buu c-- cbb cbc cbe cbi cbk cbl cbm cbr cbs cbt cbu ccb ccc cce cci cck ccl ccm ccr ccs cct ccu ce- ceb cec cee cei cek cel cem cer ces cet ceu ci- cib cic cie cii cik cil cim cir cis cit ciu ckb ckc cki ckm cks ckt cl- clb clc cle cli clk cll clm clr cls clt clu cmb cmc cme cmi cmk cml cmm cmr cms cmt cmu crb crc cre cri crk crl crm crr crs crt cru csb csc cse csi csk csl csm csr css cst csu ctb ctc cte cti ctk ctl ctm ctr cts ctt ctu cub cuc cue cui cuk cul cum cur cus cut cuu ebb ebc ebe ebi ebk ebl ebm ebr ebs ebt ebu ec- ecb ecc ece eci eck ecl ecm ecr ecs ect ecu eeb eec eee eek eel eem eer ees eet eib eic eie eii eik eil eim eir eis eit eiu ekb ekc eke eki ekl ekr eks ekt eku elb elc ele eli elk ell elm elr els elt elu em- emb emc eme emi emk eml emm emr ems emt emu erb erc ere eri erk erl erm err ers ert eru es- esb esc ese esi esk esl esm esr ess est esu etb etc ete eti etk etl etm etr ets ett etu eu- eub euc eue eui eul eur eus eut ibb ibc ibe ibi ibk ibl ibm ibr ibs ibt ibu icb icc ice ici ick icl icm icr ics ict icu ie- iec iee iei iek iel iem ier ies iet iib iic iie iii iil iim iir iis iit iiu ikb ikc ike iki ikk ikl ikr iks ikt iku il- ilb ilc ile ili ilk ill ilm ilr ils ilt ilu im- imb imc ime imi iml imm ims imt imu ir- irb irc ire iri irk irl irm irr irs irt iru is- isb isc ise isi isk isl ism isr iss ist isu itb itc ite iti itk itl itm its itt itu iu- iub iuc iue iui ium iur ius iut k-t kbb kbc kbe kbi kbk kbl kbm kbr kbs kbu kcb kcc kce kci kck kcl kcm kcr kcs kct kcu ke- keb kec kee kei kek kel kem ker kes ket kib kic kie kii kik kil kim kir kis kit kiu kkb kkc kke kki kkk kkl kkm kkr kks kkt kku kl- klb klc kli klm klr kls klt klu kmb kmc kme kmi kmk kml kmm kms kmt kmu krc kri krk krl krr krs krt kru ksb ksc kse ksi ksk ksl ksm ksr kss kst ksu ktb ktc kte ktk ktl ktm ktr kts ktt ktu kub kuc kue kui kuk kul kum kur kus kut kuu lbb lbc lbe lbi lbk lbl lbm lbr lbs lbt lbu lcb lcc lce lci lck lcl lcm lcr lcs lct lcu leb lec lee lei lek lel lem ler les let leu lib lic lie lii lik lil lim lir lis lit liu lkb lkl lkr lks lkt llb llc lle lli llk lll llm llr lls llt llu lmb lmc lme lmi lmk lml lmm lmr lms lmt lmu lrb lrc lri lrk lrm lrr lrs lrt lru lsb lsc lse lsi lsk lsl lsm lsr lss lst lsu ltb ltc lte lti ltk ltl ltm ltr lts ltt ltu lub luc lue lui luk lul lum lur lus lut luu m-r mbb mbc mbe mbi mbk mbl mbm mbr mbs mbt mbu mc- mcb mcc mce mci mck mcl mcm mcr mcs mct mcu meb mec mee mei mek mel mem mer mes met meu mi- mib mic mie mii mik mil mim mir mis mit miu mkb mkc mke mkk mkl mkm mkr mks mkt mku mlb mlc mle mli mlk mll mlm mlr mls mlt mlu mmb mmc mme mmi mmk mml mmm mmr mms mmt mmu mrb mrc mre mri mrk mrl mrm mrr mrs mrt mru msb msc mse msi msk msl msm msr mss mst msu mtb mtc mte mti mtk mtl mtm mtr mts mtt mtu mub muc mue mui muk mul mum mur mus mut muu rbb rbc rbe rbi rbk rbl rbm rbr rbs rbt rbu rcb rcc rce rci rcl rcm rcr rcs rct rcu re- reb rec ree rei rek rel rem rer res ret reu rib ric rie rii rik ril rim rir ris rit rkb rkc rke rkk rkm rks rkt rku rlc rle rli rll rlm rlr rls rlt rlu rmb rmc rme rmi rml rmm rmr rms rmt rrb rrc rri rrk rrl rrm rrr rrs rrt rru rsb rsc rse rsi rsk rsl rsm rsr rss rst rsu rtb rtc rte rti rtk rtl rtm rtr rts rtt rtu rub ruc rue rui ruk rum rur rus rut ruu sbb sbc sbe sbi sbk sbl sbm sbr sbs sbt sbu scb scc sce sci sck scl scm scr scs sct scu se- seb sec see sei sek sel sem ser ses set seu sib sic sie sii sik sil sim sir sis sit siu sk- skb skc ske ski skk skl skm skr sks skt sku slb slc sle sli