-er bbb bbd bbe bbg bbi bbk bbo bbr bdb bdd bde bdg bdi bdk bdo bdr be- beb bed bee beg bei bek beo ber bgb bgd bge bgg bgi bgk bgo bgr bi- bib bid bie big bii bik bio bir bkb bke bkg bkk bko bkr bob bod boe bog boi bok boo bor brb brd bre brg bri brk bro brr dbb dbd dbe dbg dbi dbk dbo dbr ddb ddd dde ddg ddi ddk ddo ddr de- deb ded dee deg dei dek deo der dgd dge dgg dgi dgk dgr di- dib did die dig dii dik dio dir dkb dke dkg dki dkk dko dkr dob dod doe dog doi dok doo dor drb drd dre drg dri drk dro drr ebb ebd ebe ebg ebi ebk ebo ebr ed- edb edd ede edg edi edk edo edr eeb eed eee eeg eek eeo eer egb egd ege egg egi ego egr eib eid eie eig eii eik eio eir ekb ekd eke ekg eki eko ekr eo- eob eod eoe eog eoi eok eoo eor erb erd ere erg eri erk ero err g-d gbd gbe gbg gbi gbk gbo gbr gdb gdd gde gdi gdk gdo gdr ge- geb ged gee geg gei gek geo ger ggb ggd ggg ggi ggo ggr gib gid gie gig gii gik gio gir gkb gkd gko gob god goe gog goi gok goo gor grb grd gre grg gri grk gro grr i-d ibb ibd ibe ibg ibi ibk ibo ibr idb idd ide idg idi idk ido idr ie- ied iee ieg iei iek ier igb igd ige igg igi igk igo igr iib iid iie iii iio iir ikb ike iki ikk iko ikr io- iob iod ioe iog ioi ioo ior ir- irb ird ire irg iri irk iro irr kbb kbd kbe kbi kbk kbo kbr kdb kde kdg kdk kdo kdr ke- keb ked kee keg kei kek keo ker kgb kgd kgi kgo kib kid kie kig kii kik kio kir kkb kke kki kkk kkr kob kod koe kog koi kok koo kor krd krg kri krk kro krr o-i ob- obb obd obe obg obi obk obo obr odb odd ode odg odi odo odr oeb oed oee oeg oei oeo oer ogd oge ogg ogi ogo oib oid oie oii oik oio oir okb okd oke okg oki okk oko okr oo- oob ood oog ooi ook ooo oor or- orb ord ore org ori ork oro orr rbb rbd rbe rbg rbi rbk rbo rbr rdb rdd rde rdg rdi rdo rdr re- reb red ree reg rei rek reo rer rgb rgd rge rgg rgi rgk rgo rgr rib rid rie rig rii rik rio rir rkb rke rkg rkk rko rob rod roe rog roi rok roo ror rrb rrd rrg rri rrk rrr