-er bbb bbe bbi bbk bbn bbr bbt be- beb bee bei bek ben ber bet bez bi- bib bie bii bik bin bir bit biz bkb bke bkk bkn bkr bkt bnb bne bni bnk bnn bnr bnt bnz brb bre bri brk brn brr brt brz btb bte bti btk btn btr btt btz bze bzn bzr bzz ebb ebe ebi ebk ebn ebr ebt eeb eee eek een eer eet eib eie eii eik ein eir eit ekb eke eki ekr ekt en- enb ene eni enk enn enr ent enz erb ere eri erk ern err ert erz etb ete eti etk etn etr ett etz eze ezr ezz ibb ibe ibi ibk ibn ibr ibt ibz ie- iee iei iek ien ier iet iib iie iii iin iir iit ikb ike iki ikk ikr ikt in- inb ine ini ink inn inr int ir- irb ire iri irk irn irr irt itb ite iti itk itn itt itz ize izi izz k-t k-z kbb kbe kbi kbk kbn kbr kbz ke- keb kee kei kek ken ker ket kez kib kie kii kik kin kir kit kiz kkb kke kki kkk kkn kkr kkt kn- kne kni knk knn knr knt kri krk krn krr krt ktb kte ktk ktn ktr ktt n-i nbb nbe nbi nbk nbn nbr nbt ne- neb nee nei nek nen ner net nez nib nie nii nik nin nir nit niz nke nki nkk nkn nkr nkt nnb nne nni nnk nnn nnt nnz nrb nre nri nrk nrn nrr nrt nrz ntb nte nti ntk ntn ntr ntt ntz nzb nze nzi nzz rbb rbe rbi rbk rbn rbr rbt re- reb ree rei rek ren rer ret rez rib rie rii rik rin rir rit riz rkb rke rkk rkt rkz rnb rni rnn rnr rnt rnz rrb rri rrk rrn rrr rrt rtb rte rti rtk rtn rtr rtt rtz rzb rze tbb tbe tbi tbk tbn tbr tbt tbz te- teb tee tei tek ten ter tet tez tib tie tii tik tin tir tit tiz tkb tke tkk tkr tkt tkz tnb tne tni tnk tnn tnr tnt tnz trb tre tri trk trn trr trt trz ttb tte tti ttk ttn ttr ttt tze zbb zbr zbt zeb zee zek zen zer zet zez zib zie zik zin zir zit ziz zne znn zte ztr zzr zzt zzz