-er bbb bbd bbe bbn bbo bbr bbt bdb bdd bde bdo bdr bdt be- beb bed bee ben beo ber bet bnb bnd bne bnn bno bnr bnt bob bod boe bon boo bor bot brb brd bre brn bro brr brt btb btd bte btn bto btr btt dbb dbd dbe dbn dbo dbr dbt ddb ddd dde ddn ddo ddr ddt de- deb ded dee den deo der det dnb dnd dne dnn dno dnr dnt dob dod doe don doo dor dot drb drd dre drn dro drr drt dtb dtd dte dtn dto dtr dtt ebb ebd ebe ebn ebo ebr ebt ed- edb edd ede edn edo edr edt eeb eed eee een eeo eer eet en- enb end ene enn eno enr ent eo- eob eod eoe eon eoo eor eot erb erd ere ern ero err ert etb etd ete etn eto etr ett nbb nbd nbe nbn nbo nbr nbt ndb ndd nde ndn ndo ndr ndt ne- neb ned nee nen neo ner net nnb nne nnn nno nnt no- nob nod noe non noo nor not nrb nrd nre nrn nro nrr nrt ntb ntd nte ntn nto ntr ntt ob- obb obd obe obn obo obr obt odb odd ode odn odo odr odt oeb oed oee oen oeo oer oet on- onb ond one onn ono onr ont oo- oob ood oon ooo oor oot or- orb ord ore orn oro orr ort ot- otb otd ote otn oto otr ott rbb rbd rbe rbn rbo rbr rbt rdb rdd rde rdn rdo rdr rdt re- reb red ree ren reo rer ret rnb rnd rnn rno rnr rnt rob rod roe ron roo ror rot rrb rrd rrn rrr rrt rtb rtd rte rtn rto rtr rtt tbb tbd tbe tbn tbo tbr tbt tdb tdd tde tdn tdo tdr tdt te- teb ted tee ten teo ter tet tnb tnd tne tnn tno tnr tnt to- tob tod toe ton too tor tot trb trd tre trn tro trr trt ttb ttd tte ttn tto ttr ttt