-er bbb bbe bbi bbn bbo bbr be- beb bee bei ben beo ber bi- bib bie bii bin bio bir bnb bne bni bnn bno bnr bob boe boi bon boo bor brb bre bri brn bro brr ebb ebe ebi ebn ebo ebr eeb eee een eeo eer eib eie eii ein eio eir en- enb ene eni enn eno enr eo- eob eoe eoi eon eoo eor erb ere eri ern ero err ibb ibe ibi ibn ibo ibr ie- iee iei ien ier iib iie iii iin iio iir in- inb ine ini inn ino inr io- iob ioe ioi ion ioo ior ir- irb ire iri irn iro irr n-i nbb nbe nbi nbn nbo nbr ne- neb nee nei nen neo ner nib nie nii nin nio nir nnb nne nni nnn nno no- nob noe noi non noo nor nrb nre nri nrn nro nrr o-i ob- obb obe obi obn obo obr oeb oee oei oen oeo oer oib oie oii oin oio oir on- onb one oni onn ono onr oo- oob ooi oon ooo oor or- orb ore ori orn oro orr rbb rbe rbi rbn rbo rbr re- reb ree rei ren reo rer rib rie rii rin rio rir rnb rni rnn rno rnr rob roe roi ron roo ror rrb rri rrn rrr