-er bbb bbe bbi bbn bbo bbr bbt be- beb bee bei ben beo ber bet bi- bib bie bii bin bio bir bit bnb bne bni bnn bno bnr bnt bob boe boi bon boo bor bot brb bre bri brn bro brr brt btb bte bti btn bto btr btt 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 eo- eob eoe eoi eon eoo eor eot erb ere eri ern ero err ert etb ete eti etn eto etr ett ibb ibe ibi ibn ibo ibr ibt 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 n-i nbb nbe nbi nbn nbo nbr nbt ne- neb nee nei nen neo ner net nib nie nii nin nio nir nit nnb nne nni nnn nno nnt no- nob noe noi non noo nor not nrb nre nri nrn nro nrr nrt ntb nte nti ntn nto ntr ntt o-i ob- obb obe obi obn obo obr obt oeb oee oei oen oeo oer oet oib oie oii oin oio oir oit on- onb one oni onn ono onr ont oo- oob ooi oon ooo oor oot or- orb ore ori orn oro orr ort ot- otb ote oti otn oto otr ott rbb rbe rbi rbn rbo rbr rbt re- reb ree rei ren reo rer ret rib rie rii rin rio rir rit rnb rni rnn rno rnr rnt rob roe roi ron roo ror rot rrb rri rrn rrr rrt rtb rte rti rtn rto rtr rtt tbb tbe tbi tbn tbo tbr tbt te- teb tee tei ten teo ter tet tib tie tii tin tio tir tit tnb tne tni tnn tno tnr tnt to- tob toe toi ton too tor tot trb tre tri trn tro trr trt ttb tte tti ttn tto ttr ttt