-er b-u bbb bbe bbi bbn bbo bbr bbu be- beb bee bei ben beo ber beu bi- bib bie bii bin bio bir biu bnb bne bni bnn bno bnr bnu bob boe boi bon boo bor bou brb bre bri brn bro brr bru bub bue bui bun buo bur buu ebb ebe ebi ebn ebo ebr ebu eeb eee een eeo eer eib eie eii ein eio eir eiu en- enb ene eni enn eno enr enu eo- eob eoe eoi eon eoo eor eou erb ere eri ern ero err eru eu- eub eue eui eun eur ibb ibe ibi ibn ibo ibr ibu ie- iee iei ien ier iib iie iii iin iio iir iiu in- inb ine ini inn ino inr inu io- iob ioe ioi ion ioo ior iou ir- irb ire iri irn iro irr iru iu- iub iue iui iur n-i nbb nbe nbi nbn nbo nbr nbu ne- neb nee nei nen neo ner neu nib nie nii nin nio nir niu nnb nne nni nnn nno nnu no- nob noe noi non noo nor nou nrb nre nri nrn nro nrr nru nub nue nui nun nuo nur nuu o-i ob- obb obe obi obn obo obr obu oeb oee oei oen oeo oer oib oie oii oin oio oir oiu on- onb one oni onn ono onr onu oo- oob ooi oon ooo oor or- orb ore ori orn oro orr oru ou- oue oui oun ouo our rbb rbe rbi rbn rbo rbr rbu re- reb ree rei ren reo rer reu rib rie rii rin rio rir rnb rni rnn rno rnr rnu rob roe roi ron roo ror rou rrb rri rrn rrr rru rub rue rui run ruo rur ruu ubb ube ubi ubn ubo ubr ubu ueb uee uei uen uer uib uie uii uin uio uir uiu un- unb une uni unn uno unr unu uob uoe uon uoo uor ur- urb ure uri urn uro urr uru uue uun uur uuu