-er -ey bbb bbe bbi bbn bbr bby be- beb bee bei ben ber bey bi- bib bie bii bin bir biy bnb bne bni bnn bnr brb bre bri brn brr bry by- bye byi byn byr ebb ebe ebi ebn ebr eby eeb eee een eer eey eib eie eii ein eir en- enb ene eni enn enr eny erb ere eri ern err ery eye eyn eyr ibb ibe ibi ibn ibr iby ie- iee iei ien ier iey iib iie iii iin iir in- inb ine ini inn inr iny ir- irb ire iri irn irr iry iye iyr iyy n-i nbb nbe nbi nbn nbr ne- neb nee nei nen ner ney nib nie nii nin nir nnb nne nni nnn nrb nre nri nrn nrr nry nye nyn nyy rbb rbe rbi rbn rbr re- reb ree rei ren rer rey rib rie rii rin rir riy rnb rni rnn rnr rny rrb rri rrn rrr ry- rye ryn ryr ryy ybe ybi ybr yby yeb yee yei yen yer yey yie yii yin yir yne ynn yny yre yrn yyb yye yyy