-er bbb bbd bbe bbh bbo bbr bdb bdd bde bdh bdo bdr be- beb bed bee beh beo ber bhb bhd bhe bhh bho bhr bob bod boe boh boo bor brb brd bre brh bro brr dbb dbd dbe dbh dbo dbr ddb ddd dde ddh ddo ddr de- deb ded dee deh deo der dh- dhb dhd dhe dhh dho dhr dob dod doe doh doo dor drb drd dre dro drr ebb ebd ebe ebh ebo ebr ed- edb edd ede edh edo edr eeb eed eee eeo eer ehb ehd ehe ehh eho ehr eo- eob eod eoe eoh eoo eor erb erd ere erh ero err hbb hbd hbe hbh hbo hbr hdb hdd hde hdh hdo hdr he- heb hed hee heh heo her hhb hhd hhe hhh hho hhr hob hod hoe hoh hoo hor hr- hrb hrd hre hrh hro hrr ob- obb obd obe obh obo obr odb odd ode odh odo odr oeb oed oee oeh oeo oer ohd ohe ohh oho ohr oo- oob ood ooh ooo oor or- orb ord ore orh oro orr rbb rbd rbe rbh rbo rbr rdb rdd rde rdh rdo rdr re- reb red ree reh reo rer rh- rhb rhd rhe rhh rho rhr rob rod roe roh roo ror rrb rrd rrh rrr