-er bbb bbd bbe bbi bbk bbr bbt bdb bdd bde bdi bdk bdr bdt be- beb bed bee bei bek ber bet bi- bib bid bie bii bik bir bit bkb bke bkk bkr bkt brb brd bre bri brk brr brt btb btd bte bti btk btr btt dbb dbd dbe dbi dbk dbr dbt ddb ddd dde ddi ddk ddr ddt de- deb ded dee dei dek der det di- dib did die dii dik dir dit dkb dke dki dkk dkr dkt drb drd dre dri drk drr drt dtb dtd dte dti dtk dtr dtt ebb ebd ebe ebi ebk ebr ebt ed- edb edd ede edi edk edr edt eeb eed eee eek eer eet eib eid eie eii eik eir eit ekb ekd eke eki ekr ekt erb erd ere eri erk err ert etb etd ete eti etk etr ett i-d ibb ibd ibe ibi ibk ibr ibt idb idd ide idi idk idr idt ie- ied iee iei iek ier iet iib iid iie iii iir iit ikb ike iki ikk ikr ikt ir- irb ird ire iri irk irr irt itb itd ite iti itk itt k-t kbb kbd kbe kbi kbk kbr kdb kde kdk kdr kdt ke- keb ked kee kei kek ker ket kib kid kie kii kik kir kit kkb kke kki kkk kkr kkt krd kri krk krr krt ktb kte ktk ktr ktt rbb rbd rbe rbi rbk rbr rbt rdb rdd rde rdi rdr rdt re- reb red ree rei rek rer ret rib rid rie rii rik rir rit rkb rke rkk rkt rrb rrd rri rrk rrr rrt rtb rtd rte rti rtk rtr rtt tbb tbd tbe tbi tbk tbr tbt tdb tdd tde tdi tdk tdr tdt te- teb ted tee tei tek ter tet tib tid tie tii tik tir tit tkb tke tkk tkr tkt trb trd tre tri trk trr trt ttb ttd tte tti ttk ttr ttt