-er bbb bbd bbe bbi bbk bbr bdb bdd bde bdi bdk bdr be- beb bed bee bei bek ber bi- bib bid bie bii bik bir bkb bke bkk bkr brb brd bre bri brk brr dbb dbd dbe dbi dbk dbr ddb ddd dde ddi ddk ddr de- deb ded dee dei dek der di- dib did die dii dik dir dkb dke dki dkk dkr drb drd dre dri drk drr ebb ebd ebe ebi ebk ebr ed- edb edd ede edi edk edr eeb eed eee eek eer eib eid eie eii eik eir ekb ekd eke eki ekr erb erd ere eri erk err i-d ibb ibd ibe ibi ibk ibr idb idd ide idi idk idr ie- ied iee iei iek ier iib iid iie iii iir ikb ike iki ikk ikr ir- irb ird ire iri irk irr kbb kbd kbe kbi kbk kbr kdb kde kdk kdr ke- keb ked kee kei kek ker kib kid kie kii kik kir kkb kke kki kkk kkr krd kri krk krr rbb rbd rbe rbi rbk rbr rdb rdd rde rdi rdr re- reb red ree rei rek rer rib rid rie rii rik rir rkb rke rkk rrb rrd rri rrk rrr