-er b-u bbb bbe bbi bbk bbn bbo bbr bbt bbu be- beb bee bei bek ben beo ber bet beu bi- bib bie bii bik bin bio bir bit biu bkb bke bkk bkn bko bkr bkt bnb bne bni bnk bnn bno bnr bnt bnu bob boe boi bok bon boo bor bot bou brb bre bri brk brn bro brr brt bru btb bte bti btk btn bto btr btt btu bub bue bui buk bun buo bur but buu ebb ebe ebi ebk ebn ebo ebr ebt ebu eeb eee eek een eeo eer eet eib eie eii eik ein eio eir eit eiu ekb eke eki eko ekr ekt eku en- enb ene eni enk enn eno enr ent enu eo- eob eoe eoi eok eon eoo eor eot eou erb ere eri erk ern ero err ert eru etb ete eti etk etn eto etr ett etu eu- eub eue eui eun eur eut ibb ibe ibi ibk ibn ibo ibr ibt ibu ie- iee iei iek ien ier iet iib iie iii iin iio iir iit iiu ikb ike iki ikk iko ikr ikt iku in- inb ine ini ink inn ino inr int inu io- iob ioe ioi ion ioo ior iot iou ir- irb ire iri irk irn iro irr irt iru itb ite iti itk itn ito itt itu iu- iub iue iui iur iut k-t kbb kbe kbi kbk kbn kbo kbr kbu ke- keb kee kei kek ken keo ker ket kib kie kii kik kin kio kir kit kiu kkb kke kki kkk kkn kkr kkt kku kn- kne kni knk knn kno knr knt knu kob koe koi kok kon koo kor kot kou kri krk krn kro krr krt kru ktb kte ktk ktn kto ktr ktt ktu kub kue kui kuk kun kur kut kuu n-i nbb nbe nbi nbk nbn nbo nbr nbt nbu ne- neb nee nei nek nen neo ner net neu nib nie nii nik nin nio nir nit niu nke nki nkk nkn nko nkr nkt nku nnb nne nni nnk nnn nno nnt nnu no- nob noe noi nok non noo nor not nou nrb nre nri nrk nrn nro nrr nrt nru ntb nte nti ntk ntn nto ntr ntt ntu nub nue nui nuk nun nuo nur nut nuu o-i ob- obb obe obi obk obn obo obr obt obu oeb oee oei oen oeo oer oet oib oie oii oik oin oio oir oit oiu okb oke oki okk oko okr oku on- onb one oni onk onn ono onr ont onu oo- oob ooi ook oon ooo oor oot or- orb ore ori ork orn oro orr ort oru ot- otb ote oti otk otn oto otr ott otu ou- oue oui ouk oun ouo our out rbb rbe rbi rbk rbn rbo rbr rbt rbu re- reb ree rei rek ren reo rer ret reu rib rie rii rik rin rio rir rit rkb rke rkk rko rkt rku rnb rni rnn rno rnr rnt rnu rob roe roi rok ron roo ror rot rou rrb rri rrk rrn rrr rrt rru rtb rte rti rtk rtn rto rtr rtt rtu rub rue rui ruk run ruo rur rut ruu tbb tbe tbi tbk tbn tbo tbr tbt tbu te- teb tee tei tek ten teo ter tet teu tib tie tii tik tin tio tir tit tiu tkb tke tkk tko tkr tkt tnb tne tni tnk tnn tno tnr tnt to- tob toe toi tok ton too tor tot tou trb tre tri trk trn tro trr trt tru ttb tte tti ttk ttn tto ttr ttt ttu tub tue tui tuk tun tuo tur tut tuu ubb ube ubi ubk ubn ubo ubr ubt ubu ueb uee uei uen uer uet uib uie uii uin uio uir uit uiu ukb uke uki ukk ukn ukr uku un- unb une uni unk unn uno unr unt unu uob uoe uok uon uoo uor uot ur- urb ure uri urk urn uro urr urt uru utb ute uti utk utn uto utr utt utu uue uun uur uut uuu