-er -ic b-u bbb bbc bbe bbi bbk bbl bbm bbr bbu bcb bcc bce bci bck bcl bcm bcr bcu be- beb bec bee bei bek bel bem ber beu bi- bib bic bie bii bik bil bim bir biu bkb bkc bke bkk bkl bkm bkr blb blc ble bli blk bll blm blr blu bmb bmc bme bmi bmk bml bmm bmr bmu brb bre bri brk brl brm brr bru bub buc bue bui buk bul bum bur buu c-- cbb cbc cbe cbi cbk cbl cbm cbr cbu ccb ccc cce cci cck ccl ccm ccr ccu ce- ceb cec cee cei cek cel cem cer ceu ci- cib cic cie cii cik cil cim cir ciu ckb ckc cki ckm cl- clb clc cle cli clk cll clm clr clu cmb cmc cme cmi cmk cml cmm cmr cmu crb crc cre cri crk crl crm crr cru cub cuc cue cui cuk cul cum cur cuu ebb ebc ebe ebi ebk ebl ebm ebr ebu ec- ecb ecc ece eci eck ecl ecm ecr ecu eeb eec eee eek eel eem eer eib eic eie eii eik eil eim eir eiu ekb ekc eke eki ekl ekr eku elb elc ele eli elk ell elm elr elu em- emb emc eme emi emk eml emm emr emu erb erc ere eri erk erl erm err eru eu- eub euc eue eui eul eur ibb ibc ibe ibi ibk ibl ibm ibr ibu icb icc ice ici ick icl icm icr icu ie- iec iee iei iek iel iem ier iib iic iie iii iil iim iir iiu ikb ikc ike iki ikk ikl ikr iku il- ilb ilc ile ili ilk ill ilm ilr ilu im- imb imc ime imi iml imm imu ir- irb irc ire iri irk irl irm irr iru iu- iub iuc iue iui ium iur kbb kbc kbe kbi kbk kbl kbm kbr kbu kcb kcc kce kci kck kcl kcm kcr kcu ke- keb kec kee kei kek kel kem ker kib kic kie kii kik kil kim kir kiu kkb kkc kke kki kkk kkl kkm kkr kku kl- klb klc kli klm klr klu kmb kmc kme kmi kmk kml kmm kmu krc kri krk krl krr kru kub kuc kue kui kuk kul kum kur kuu lbb lbc lbe lbi lbk lbl lbm lbr lbu lcb lcc lce lci lck lcl lcm lcr lcu leb lec lee lei lek lel lem ler leu lib lic lie lii lik lil lim lir liu lkb lkl lkr llb llc lle lli llk lll llm llr llu lmb lmc lme lmi lmk lml lmm lmr lmu lrb lrc lri lrk lrm lrr lru lub luc lue lui luk lul lum lur luu m-r mbb mbc mbe mbi mbk mbl mbm mbr mbu mc- mcb mcc mce mci mck mcl mcm mcr mcu meb mec mee mei mek mel mem mer meu mi- mib mic mie mii mik mil mim mir miu mkb mkc mke mkk mkl mkm mkr mku mlb mlc mle mli mlk mll mlm mlr mlu mmb mmc mme mmi mmk mml mmm mmr mmu mrb mrc mre mri mrk mrl mrm mrr mru mub muc mue mui muk mul mum mur muu rbb rbc rbe rbi rbk rbl rbm rbr rbu rcb rcc rce rci rcl rcm rcr rcu re- reb rec ree rei rek rel rem rer reu rib ric rie rii rik ril rim rir rkb rkc rke rkk rkm rku rlc rle rli rll rlm rlr rlu rmb rmc rme rmi rml rmm rmr rrb rrc rri rrk rrl rrm rrr rru rub ruc rue rui ruk rum rur ruu ubb ubc ube ubi ubk ubl ubr ubu ucb ucc uce uci uck ucl ucm ucr ucu ueb uec uee uei uel uem uer uib uic uie uii uil uim uir uiu ukb ukc uke uki ukk ukl ukr uku ulb ulc ule uli ulk ull ulm ulr ulu um- umb umc ume umi uml umm umr umu ur- urb urc ure uri urk url urm urr uru uuc uue uum uur uuu