-er bbb bbd bbe bbi bbo bbr bbt bdb bdd bde bdi bdo bdr bdt bdz be- beb bed bee bei beo ber bet bez bi- bib bid bie bii bio bir bit biz bob bod boe boi boo bor bot boz brb brd bre bri bro brr brt brz btb btd bte bti bto btr btt btz bzd bze bzo bzr bzz dbb dbd dbe dbi dbo dbr dbt dbz ddb ddd dde ddi ddo ddr ddt ddz de- deb ded dee dei deo der det dez di- dib did die dii dio dir dit diz dob dod doe doi doo dor dot doz drb drd dre dri dro drr drt drz dtb dtd dte dti dto dtr dtt dtz dzb dzd dze dzi dzo dzr ebb ebd ebe ebi ebo ebr ebt ed- edb edd ede edi edo edr edt eeb eed eee eeo eer eet eib eid eie eii eio eir eit eo- eob eod eoe eoi eoo eor eot erb erd ere eri ero err ert erz etb etd ete eti eto etr ett etz eze ezo ezr ezz i-d ibb ibd ibe ibi ibo ibr ibt ibz idb idd ide idi ido idr idt ie- ied iee iei ier iet iib iid iie iii iio iir iit io- iob iod ioe ioi ioo ior iot ir- irb ird ire iri iro irr irt itb itd ite iti ito itt itz ize izi izo izz o-i ob- obb obd obe obi obo obr obt odb odd ode odi odo odr odt oeb oed oee oei oeo oer oet oib oid oie oii oio oir oit oiz oo- oob ood ooi ooo oor oot or- orb ord ore ori oro orr ort orz ot- otb otd ote oti oto otr ott otz oze ozo ozt ozz rbb rbd rbe rbi rbo rbr rbt rdb rdd rde rdi rdo rdr rdt re- reb red ree rei reo rer ret rez rib rid rie rii rio rir rit riz rob rod roe roi roo ror rot roz rrb rrd rri rrr rrt rtb rtd rte rti rto rtr rtt rtz rzb rze rzo tbb tbd tbe tbi tbo tbr tbt tbz tdb tdd tde tdi tdo tdr tdt te- teb ted tee tei teo ter tet tez tib tid tie tii tio tir tit tiz to- tob tod toe toi too tor tot toz trb trd tre tri tro trr trt trz ttb ttd tte tti tto ttr ttt tzd tze zbb zbr zbt zdt zeb zed zee zeo zer zet zez zib zid zie zio zir zit ziz zo- zob zod zoe zoi zoo zor zot zro zte ztr zzr zzt zzz