-er -ji b-u bbb bbe bbf bbi bbo bbr bbu be- beb bee bef bei beo ber beu bfb bfe bff bfi bfj bfo bfr bfu bi- bib bie bif bii bij bio bir biu bjf bji bjj bjr bju bob boe bof boi boj boo bor bou brb bre brf bri brj bro brr bru bub bue buf bui buj buo bur buu ebb ebe ebf ebi ebj ebo ebr ebu eeb eee eef eeo eer ef- efb efe eff efi efo efr eib eie eif eii eij eio eir eiu ejf eji ejo eju eo- eob eoe eof eoi eoo eor eou erb ere erf eri ero err eru eu- eub eue euf eui euj eur fbb fbe fbf fbi fbo fbr fbu feb fee fef fei feo fer feu ffe fff ffi ffo ffr ffu fib fie fif fii fij fir fiu fjb fji fob foe fof foi foo for fou frb fre frf fri frj fro frr fru fub fue fuf fui fuo fur fuu i-f ibb ibe ibf ibi ibj ibo ibr ibu ie- iee ief iei iej ier ifb ife iff ifi ifo ifr ifu iib iie iif iii iij iio iir iiu ijb ije ijf iji ijo iju io- iob ioe iof ioi ioj ioo ior iou ir- irb ire irf iri irj iro irr iru iu- iub iue iui iur j-i jbf jbi jbj jbo jbr jbu jeb jee jef jei jej jeo jer jeu jfb jfe jff jfi jfj jfo jfr jib jie jif jii jij jio jir jiu jjb jjf jjj jjr jju job joe jof joi joj joo jor jou jrb jrf jri jro jrr jub jue juf jui juo jur o-i ob- obb obe obf obi obj obo obr obu oeb oee oef oei oeo oer of- ofb ofe off ofi ofo ofr ofu oib oie oif oii oio oir oiu ojb oje oji ojo oju oo- oob oof ooi ooo oor or- orb ore orf ori oro orr oru ou- oue ouf oui ouo our rbb rbe rbf rbi rbo rbr rbu re- reb ree ref rei reo rer reu rfb rfe rff rfi rfj rfo rfr rfu rib rie rif rii rio rir rjf rjr rob roe rof roi roj roo ror rou rrb rrf rri rrr rru rub rue ruf rui ruo rur ruu ubb ube ubf ubi ubo ubr ubu ueb uee uef uei uer ufe uff ufi ufj ufo ufr ufu uib uie uif uii uio uir uiu uji ujo uob uoe uoj uoo uor ur- urb ure urf uri uro urr uru uue uur uuu