-er bbb bbe bbi bbn bbo bbr bbt be- beb bee bei ben beo ber bet bez bi- bib bie bii bin bio bir bit biz bnb bne bni bnn bno bnr bnt bnz bob boe boi bon boo bor bot boz brb bre bri brn bro brr brt brz btb bte bti btn bto btr btt btz bze bzn bzo bzr bzz ebb ebe ebi ebn ebo ebr ebt eeb eee een eeo eer eet eib eie eii ein eio eir eit en- enb ene eni enn eno enr ent enz eo- eob eoe eoi eon eoo eor eot erb ere eri ern ero err ert erz etb ete eti etn eto etr ett etz eze ezo ezr ezz ibb ibe ibi ibn ibo ibr ibt ibz ie- iee iei ien ier iet iib iie iii iin iio iir iit in- inb ine ini inn ino inr int io- iob ioe ioi ion ioo ior iot ir- irb ire iri irn iro irr irt itb ite iti itn ito itt itz ize izi izo izz n-i nbb nbe nbi nbn nbo nbr nbt ne- neb nee nei nen neo ner net nez nib nie nii nin nio nir nit niz nnb nne nni nnn nno nnt nnz no- nob noe noi non noo nor not noz nrb nre nri nrn nro nrr nrt nrz ntb nte nti ntn nto ntr ntt ntz nzb nze nzi nzo nzz o-i ob- obb obe obi obn obo obr obt oeb oee oei oen oeo oer oet oib oie oii oin oio oir oit oiz on- onb one oni onn ono onr ont oo- oob ooi oon ooo oor oot or- orb ore ori orn oro orr ort orz ot- otb ote oti otn oto otr ott otz oze ozo ozt ozz rbb rbe rbi rbn rbo rbr rbt re- reb ree rei ren reo rer ret rez rib rie rii rin rio rir rit riz rnb rni rnn rno rnr rnt rnz rob roe roi ron roo ror rot roz rrb rri rrn rrr rrt rtb rte rti rtn rto rtr rtt rtz rzb rze rzo tbb tbe tbi tbn tbo tbr tbt tbz te- teb tee tei ten teo ter tet tez tib tie tii tin tio tir tit tiz tnb tne tni tnn tno tnr tnt tnz to- tob toe toi ton too tor tot toz trb tre tri trn tro trr trt trz ttb tte tti ttn tto ttr ttt tze zbb zbr zbt zeb zee zen zeo zer zet zez zib zie zin zio zir zit ziz zne znn zno zo- zob zoe zoi zon zoo zor zot zro zte ztr zzr zzt zzz