-er b-u bbb bbe bbi bbk bbl bbm bbr bbs bbu be- beb bee bei bek bel bem ber bes beu bi- bib bie bii bik bil bim bir bis biu bkb bke bkk bkl bkm bkr bks blb ble bli blk bll blm blr bls blu bmb bme bmi bmk bml bmm bmr bms bmu brb bre bri brk brl brm brr brs bru bsb bse bsi bsk bsl bsm bsr bss bsu bub bue bui buk bul bum bur bus buu ebb ebe ebi ebk ebl ebm ebr ebs ebu eeb eee eek eel eem eer ees eib eie eii eik eil eim eir eis eiu ekb eke eki ekl ekr eks eku elb ele eli elk ell elm elr els elu em- emb eme emi emk eml emm emr ems emu erb ere eri erk erl erm err ers eru es- esb ese esi esk esl esm esr ess esu eu- eub eue eui eul eur eus ibb ibe ibi ibk ibl ibm ibr ibs ibu ie- iee iei iek iel iem ier ies iib iie iii iil iim iir iis iiu ikb ike iki ikk ikl ikr iks iku il- ilb ile ili ilk ill ilm ilr ils ilu im- imb ime imi iml imm ims imu ir- irb ire iri irk irl irm irr irs iru is- isb ise isi isk isl ism isr iss isu iu- iub iue iui ium iur ius kbb kbe kbi kbk kbl kbm kbr kbs kbu ke- keb kee kei kek kel kem ker kes kib kie kii kik kil kim kir kis kiu kkb kke kki kkk kkl kkm kkr kks kku kl- klb kli klm klr kls klu kmb kme kmi kmk kml kmm kms kmu kri krk krl krr krs kru ksb kse ksi ksk ksl ksm ksr kss ksu kub kue kui kuk kul kum kur kus kuu lbb lbe lbi lbk lbl lbm lbr lbs lbu leb lee lei lek lel lem ler les leu lib lie lii lik lil lim lir lis liu lkb lkl lkr lks llb lle lli llk lll llm llr lls llu lmb lme lmi lmk lml lmm lmr lms lmu lrb lri lrk lrm lrr lrs lru lsb lse lsi lsk lsl lsm lsr lss lsu lub lue lui luk lul lum lur lus luu m-r mbb mbe mbi mbk mbl mbm mbr mbs mbu meb mee mei mek mel mem mer mes meu mi- mib mie mii mik mil mim mir mis miu mkb mke mkk mkl mkm mkr mks mku mlb mle mli mlk mll mlm mlr mls mlu mmb mme mmi mmk mml mmm mmr mms mmu mrb mre mri mrk mrl mrm mrr mrs mru msb mse msi msk msl msm msr mss msu mub mue mui muk mul mum mur mus muu rbb rbe rbi rbk rbl rbm rbr rbs rbu re- reb ree rei rek rel rem rer res reu rib rie rii rik ril rim rir ris rkb rke rkk rkm rks rku rle rli rll rlm rlr rls rlu rmb rme rmi rml rmm rmr rms rrb rri rrk rrl rrm rrr rrs rru rsb rse rsi rsk rsl rsm rsr rss rsu rub rue rui ruk rum rur rus ruu sbb sbe sbi sbk sbl sbm sbr sbs sbu se- seb see sei sek sel sem ser ses seu sib sie sii sik sil sim sir sis siu sk- skb ske ski skk skl skm skr sks sku slb sle sli slk sll slm slr sls slu smb sme smi smk sml smm smr sms smu sr- srb sre sri srk srl srm srr srs ss- ssb sse ssi ssk ssl ssm ssr sss ssu sub sue sui suk sul sum sur sus suu ubb ube ubi ubk ubl ubr ubs ubu ueb uee uei uel uem uer ues uib uie uii uil uim uir uis uiu ukb uke uki ukk ukl ukr uku ulb ule uli ulk ull ulm ulr uls ulu um- umb ume umi uml umm umr ums umu ur- urb ure uri urk url urm urr urs uru usb use usi usk usl usm usr uss usu uue uum uur uus uuu