-er bbb bbd bbe bbh bbk bbo bbr bdb bdd bde bdh bdk bdo bdr be- beb bed bee beh bek beo ber bhb bhd bhe bhh bhk bho bhr bkb bke bkk bko bkr bob bod boe boh bok boo bor brb brd bre brh brk bro brr dbb dbd dbe dbh dbk dbo dbr ddb ddd dde ddh ddk ddo ddr de- deb ded dee deh dek deo der dh- dhb dhd dhe dhh dhk dho dhr dkb dke dkk dko dkr dob dod doe doh dok doo dor drb drd dre drk dro drr ebb ebd ebe ebh ebk ebo ebr ed- edb edd ede edh edk edo edr eeb eed eee eek eeo eer ehb ehd ehe ehh eho ehr ekb ekd eke ekh eko ekr eo- eob eod eoe eoh eok eoo eor erb erd ere erh erk ero err hbb hbd hbe hbh hbk hbo hbr hdb hdd hde hdh hdk hdo hdr he- heb hed hee heh hek heo her hhb hhd hhe hhh hhk hho hhr hkb hkd hkh hkk hko hkr hob hod hoe hoh hok hoo hor hr- hrb hrd hre hrh hrk hro hrr kbb kbd kbe kbh kbk kbo kbr kdb kde kdh kdk kdo kdr ke- keb ked kee keh kek keo ker khe khh khk kho khr kkb kke kkh kkk kkr kob kod koe koh kok koo kor krd krk kro krr ob- obb obd obe obh obk obo obr odb odd ode odh odo odr oeb oed oee oeh oeo oer ohd ohe ohh oho ohr okb okd oke okk oko okr oo- oob ood ooh ook ooo oor or- orb ord ore orh ork oro orr rbb rbd rbe rbh rbk rbo rbr rdb rdd rde rdh rdo rdr re- reb red ree reh rek reo rer rh- rhb rhd rhe rhh rho rhr rkb rke rkk rko rob rod roe roh rok roo ror rrb rrd rrh rrk rrr