-er bbb bbd bbe bbi bbk bbo bbr bbt bdb bdd bde bdi bdk bdo bdr bdt bdz be- beb bed bee bei bek beo ber bet bez bi- bib bid bie bii bik bio bir bit biz bkb bke bkk bko bkr bkt bob bod boe boi bok boo bor bot boz brb brd bre bri brk bro brr brt brz btb btd bte bti btk bto btr btt btz bzd bze bzo bzr bzz dbb dbd dbe dbi dbk dbo dbr dbt dbz ddb ddd dde ddi ddk ddo ddr ddt ddz de- deb ded dee dei dek deo der det dez di- dib did die dii dik dio dir dit diz dkb dke dki dkk dko dkr dkt dob dod doe doi dok doo dor dot doz drb drd dre dri drk dro drr drt drz dtb dtd dte dti dtk dto dtr dtt dtz dzb dzd dze dzi dzo dzr ebb ebd ebe ebi ebk ebo ebr ebt ed- edb edd ede edi edk edo edr edt eeb eed eee eek eeo eer eet eib eid eie eii eik eio eir eit ekb ekd eke eki eko ekr ekt eo- eob eod eoe eoi eok eoo eor eot erb erd ere eri erk ero err ert erz etb etd ete eti etk eto etr ett etz eze ezo ezr ezz i-d ibb ibd ibe ibi ibk ibo ibr ibt ibz idb idd ide idi idk ido idr idt ie- ied iee iei iek ier iet iib iid iie iii iio iir iit ikb ike iki ikk iko ikr ikt io- iob iod ioe ioi ioo ior iot ir- irb ird ire iri irk iro irr irt itb itd ite iti itk ito itt itz ize izi izo izz k-t k-z kbb kbd kbe kbi kbk kbo kbr kbz kdb kde kdk kdo kdr kdt ke- keb ked kee kei kek keo ker ket kez kib kid kie kii kik kio kir kit kiz kkb kke kki kkk kkr kkt kob kod koe koi kok koo kor kot koz krd kri krk kro krr krt ktb kte ktk kto ktr ktt kzo o-i ob- obb obd obe obi obk obo obr obt odb odd ode odi odo odr odt oeb oed oee oei oeo oer oet oib oid oie oii oik oio oir oit oiz okb okd oke oki okk oko okr oo- oob ood ooi ook ooo oor oot or- orb ord ore ori ork oro orr ort orz ot- otb otd ote oti otk oto otr ott otz oze ozo ozt ozz rbb rbd rbe rbi rbk rbo rbr rbt rdb rdd rde rdi rdo rdr rdt re- reb red ree rei rek reo rer ret rez rib rid rie rii rik rio rir rit riz rkb rke rkk rko rkt rkz rob rod roe roi rok roo ror rot roz rrb rrd rri rrk rrr rrt rtb rtd rte rti rtk rto rtr rtt rtz rzb rze rzo tbb tbd tbe tbi tbk tbo tbr tbt tbz tdb tdd tde tdi tdk tdo tdr tdt te- teb ted tee tei tek teo ter tet tez tib tid tie tii tik tio tir tit tiz tkb tke tkk tko tkr tkt tkz to- tob tod toe toi tok too tor tot toz trb trd tre tri trk tro trr trt trz ttb ttd tte tti ttk tto ttr ttt tzd tze zbb zbr zbt zdt zeb zed zee zek zeo zer zet zez zib zid zie zik zio zir zit ziz zo- zob zod zoe zoi zok zoo zor zot zro zte ztr zzr zzt zzz