-er bbb bbd bbe bbh bbn bbo bbr bdb bdd bde bdh bdo bdr be- beb bed bee beh ben beo ber bhb bhd bhe bhh bho bhr bnb bnd bne bnn bno bnr bob bod boe boh bon boo bor brb brd bre brh brn bro brr dbb dbd dbe dbh dbn dbo dbr ddb ddd dde ddh ddn ddo ddr de- deb ded dee deh den deo der dh- dhb dhd dhe dhh dho dhr dnb dnd dne dnh dnn dno dnr dob dod doe doh don doo dor drb drd dre drn dro drr ebb ebd ebe ebh ebn ebo ebr ed- edb edd ede edh edn edo edr eeb eed eee een eeo eer ehb ehd ehe ehh ehn eho ehr en- enb end ene enh enn eno enr eo- eob eod eoe eoh eon eoo eor erb erd ere erh ern ero err hbb hbd hbe hbh hbn hbo hbr hdb hdd hde hdh hdn hdo hdr he- heb hed hee heh hen heo her hhb hhd hhe hhh hhn hho hhr hnb hnd hne hnh hnn hno hob hod hoe hoh hon hoo hor hr- hrb hrd hre hrh hrn hro hrr nbb nbd nbe nbn nbo nbr ndb ndd nde ndh ndn ndo ndr ne- neb ned nee neh nen neo ner nhb nhd nhe nhh nhn nhr nnb nne nnh nnn nno no- nob nod noe noh non noo nor nrb nrd nre nrn nro nrr ob- obb obd obe obh obn obo obr odb odd ode odh odn odo odr oeb oed oee oeh oen oeo oer ohd ohe ohh ohn oho ohr on- onb ond one onh onn ono onr oo- oob ood ooh oon ooo oor or- orb ord ore orh orn oro orr rbb rbd rbe rbh rbn rbo rbr rdb rdd rde rdh rdn rdo rdr re- reb red ree reh ren reo rer rh- rhb rhd rhe rhh rhn rho rhr rnb rnd rnh rnn rno rnr rob rod roe roh ron roo ror rrb rrd rrh rrn rrr