-er a-a a-b a-t aaa aab aad aae aan aao aar aat aau ab- aba abb abd abe abn abo abr abt abu ad- ada adb add ade adn ado adr adt adu aea aeb aed aee aen aeo aer aet aeu an- ana anb and ane ann ano anr ant anu aoa aob aod aoe aon aoo aor aot aou ar- ara arb ard are arn aro arr art aru at- ata atb atd ate atn ato atr att atu au- aua aub aud aue aun auo aur aut b-u baa bab bad bae ban bao bar bat bau bba bbb bbd bbe bbn bbo bbr bbt bbu bda bdb bdd bde bdo bdr bdt bdu be- bea beb bed bee ben beo ber bet beu bna bnb bnd bne bnn bno bnr bnt bnu boa bob bod boe bon boo bor bot bou bra brb brd bre brn bro brr brt bru bta btb btd bte btn bto btr btt btu bua bub bud bue bun buo bur but buu daa dab dad dae dan dao dar dat dau dba dbb dbd dbe dbn dbo dbr dbt dbu dda ddb ddd dde ddn ddo ddr ddt ddu de- dea deb ded dee den deo der det deu dna dnb dnd dne dnn dno dnr dnt doa dob dod doe don doo dor dot dou dra drb drd dre drn dro drr drt dru dta dtb dtd dte dtn dto dtr dtt dtu dua dub dud due dun duo dur dut eaa eab ead eae ean eao ear eat eau eba ebb ebd ebe ebn ebo ebr ebt ebu ed- eda edb edd ede edn edo edr edt edu eea eeb eed eee een eeo eer eet en- ena enb end ene enn eno enr ent enu eo- eoa eob eod eoe eon eoo eor eot eou era erb erd ere ern ero err ert eru eta etb etd ete etn eto etr ett etu eu- eua eub eud eue eun eur eut naa nab nad nae nan nao nar nat nau nba nbb nbd nbe nbn nbo nbr nbt nbu nda ndb ndd nde ndn ndo ndr ndt ndu ne- nea neb ned nee nen neo ner net neu nna nnb nne nnn nno nnt nnu no- noa nob nod noe non noo nor not nou nra nrb nrd nre nrn nro nrr nrt nru nta ntb ntd nte ntn nto ntr ntt ntu nua nub nud nue nun nuo nur nut nuu oaa oab oad oae oan oao oar oat oau ob- oba obb obd obe obn obo obr obt obu oda odb odd ode odn odo odr odt odu oea oeb oed oee oen oeo oer oet on- ona onb ond one onn ono onr ont onu oo- ooa oob ood oon ooo oor oot or- ora orb ord ore orn oro orr ort oru ot- ota otb otd ote otn oto otr ott otu ou- oua oud oue oun ouo our out ra- raa rab rad rae ran rao rar rat rau rba rbb rbd rbe rbn rbo rbr rbt rbu rda rdb rdd rde rdn rdo rdr rdt rdu re- rea reb red ree ren reo rer ret reu rna rnb rnd rnn rno rnr rnt rnu roa rob rod roe ron roo ror rot rou rra rrb rrd rrn rrr rrt rru rta rtb rtd rte rtn rto rtr rtt rtu rua rub rud rue run ruo rur rut ruu taa tab tad tae tan tao tar tat tau tba tbb tbd tbe tbn tbo tbr tbt tbu tda tdb tdd tde tdn tdo tdr tdt tdu te- tea teb ted tee ten teo ter tet teu tna tnb tnd tne tnn tno tnr tnt to- toa tob tod toe ton too tor tot tou tra trb trd tre trn tro trr trt tru tta ttb ttd tte ttn tto ttr ttt ttu tua tub tud tue tun tuo tur tut tuu ua- uaa uab uad uae uan uao uar uat uau uba ubb ube ubn ubo ubr ubt ubu uda udb udd ude udn udo udr udt udu uea ueb ued uee uen uer uet un- una unb und une unn uno unr unt unu uoa uob uod uoe uon uoo uor uot ur- ura urb urd ure urn uro urr urt uru uta utb utd ute utn uto utr utt utu uua uue uun uur uut uuu