-er -ji bbb bbe bbi bbk bbr be- beb bee bei bek ber bi- bib bie bii bij bik bir bji bjj bjk bjr bkb bke bkk bkr brb bre bri brj brk brr ebb ebe ebi ebj ebk ebr eeb eee eek eer eib eie eii eij eik eir eji ekb eke eki ekr erb ere eri erk err ibb ibe ibi ibj ibk ibr ie- iee iei iej iek ier iib iie iii iij iir ijb ije iji ijk ikb ike iki ikk ikr ir- irb ire iri irj irk irr j-i jbi jbj jbk jbr jeb jee jei jej jek jer jib jie jii jij jir jjb jjj jjk jjr jkb jkk jkr jrb jri jrk jrr kbb kbe kbi kbk kbr ke- keb kee kei kek ker kib kie kii kij kik kir kjb kje kji kjr kkb kke kki kkk kkr kri krk krr rbb rbe rbi rbk rbr re- reb ree rei rek rer rib rie rii rik rir rjk rjr rkb rke rkk rrb rri rrk rrr