-er b-u bbb bbd bbe bbn bbo bbr bbt bbu bdb bdd bde bdo bdr bdt bdu be- beb bed bee ben beo ber bet beu bnb bnd bne bnn bno bnr bnt bnu bob bod boe bon boo bor bot bou brb brd bre brn bro brr brt bru btb btd bte btn bto btr btt btu bub bud bue bun buo bur but buu dbb dbd dbe dbn dbo dbr dbt dbu ddb ddd dde ddn ddo ddr ddt ddu de- deb ded dee den deo der det deu dnb dnd dne dnn dno dnr dnt dob dod doe don doo dor dot dou drb drd dre drn dro drr drt dru dtb dtd dte dtn dto dtr dtt dtu dub dud due dun duo dur dut ebb ebd ebe ebn ebo ebr ebt ebu ed- edb edd ede edn edo edr edt edu eeb eed eee een eeo eer eet en- enb end ene enn eno enr ent enu eo- eob eod eoe eon eoo eor eot eou erb erd ere ern ero err ert eru etb etd ete etn eto etr ett etu eu- eub eud eue eun eur eut nbb nbd nbe nbn nbo nbr nbt nbu ndb ndd nde ndn ndo ndr ndt ndu ne- neb ned nee nen neo ner net neu nnb nne nnn nno nnt nnu no- nob nod noe non noo nor not nou nrb nrd nre nrn nro nrr nrt nru ntb ntd nte ntn nto ntr ntt ntu nub nud nue nun nuo nur nut nuu ob- obb obd obe obn obo obr obt obu odb odd ode odn odo odr odt odu oeb oed oee oen oeo oer oet on- onb ond one onn ono onr ont onu oo- oob ood oon ooo oor oot or- orb ord ore orn oro orr ort oru ot- otb otd ote otn oto otr ott otu ou- oud oue oun ouo our out rbb rbd rbe rbn rbo rbr rbt rbu rdb rdd rde rdn rdo rdr rdt rdu re- reb red ree ren reo rer ret reu rnb rnd rnn rno rnr rnt rnu rob rod roe ron roo ror rot rou rrb rrd rrn rrr rrt rru rtb rtd rte rtn rto rtr rtt rtu rub rud rue run ruo rur rut ruu tbb tbd tbe tbn tbo tbr tbt tbu tdb tdd tde tdn tdo tdr tdt tdu te- teb ted tee ten teo ter tet teu tnb tnd tne tnn tno tnr tnt to- tob tod toe ton too tor tot tou trb trd tre trn tro trr trt tru ttb ttd tte ttn tto ttr ttt ttu tub tud tue tun tuo tur tut tuu ubb ube ubn ubo ubr ubt ubu udb udd ude udn udo udr udt udu ueb ued uee uen uer uet un- unb und une unn uno unr unt unu uob uod uoe uon uoo uor uot ur- urb urd ure urn uro urr urt uru utb utd ute utn uto utr utt utu uue uun uur uut uuu