-er -ji bbb bbe bbi bbo bbr be- beb bee bei beo ber bi- bib bie bii bij bio bir bji bjj bjr bob boe boi boj boo bor brb bre bri brj bro brr ebb ebe ebi ebj ebo ebr eeb eee eeo eer eib eie eii eij eio eir eji ejo eo- eob eoe eoi eoo eor erb ere eri ero err ibb ibe ibi ibj ibo ibr ie- iee iei iej ier iib iie iii iij iio iir ijb ije iji ijo io- iob ioe ioi ioj ioo ior ir- irb ire iri irj iro irr j-i jbi jbj jbo jbr jeb jee jei jej jeo jer jib jie jii jij jio jir jjb jjj jjr job joe joi joj joo jor jrb jri jro jrr o-i ob- obb obe obi obj obo obr oeb oee oei oeo oer oib oie oii oio oir ojb oje oji ojo oo- oob ooi ooo oor or- orb ore ori oro orr rbb rbe rbi rbo rbr re- reb ree rei reo rer rib rie rii rio rir rjr rob roe roi roj roo ror rrb rri rrr