-er a-a a-b a-t aaa aab aad aae aan aar aat aau aax ab- aba abb abd abe abn abr abt abu abx ad- ada adb add ade adn adr adt adu adx aea aeb aed aee aen aer aet aeu aex an- ana anb and ane ann anr ant anu anx ar- ara arb ard are arn arr art aru arx at- ata atb atd ate atn atr att atu atx au- aua aub aud aue aun aur aut aux ax- axa axe axn axr axt axx b-u baa bab bad bae ban bar bat bau bax bba bbb bbd bbe bbn bbr bbt bbu bbx bda bdb bdd bde bdr bdt bdu bdx be- bea beb bed bee ben ber bet beu bex bna bnb bnd bne bnn bnr bnt bnu bnx bra brb brd bre brn brr brt bru brx bta btb btd bte btn btr btt btu btx bua bub bud bue bun bur but buu bux bxb bxd bxn bxx daa dab dad dae dan dar dat dau dax dba dbb dbd dbe dbn dbr dbt dbu dbx dda ddb ddd dde ddn ddr ddt ddu ddx de- dea deb ded dee den der det deu dex dna dnb dnd dne dnn dnr dnt dra drb drd dre drn drr drt dru drx dta dtb dtd dte dtn dtr dtt dtu dtx dua dub dud due dun dur dut dux dxd dxn dxr dxt dxx eaa eab ead eae ean ear eat eau eax eba ebb ebd ebe ebn ebr ebt ebu ebx ed- eda edb edd ede edn edr edt edu edx eea eeb eed eee een eer eet eex en- ena enb end ene enn enr ent enu era erb erd ere ern err ert eru eta etb etd ete etn etr ett etu etx eu- eua eub eud eue eun eur eut eux ex- exa exd exe exr ext exu exx naa nab nad nae nan nar nat nau nax nba nbb nbd nbe nbn nbr nbt nbu nbx nda ndb ndd nde ndn ndr ndt ndu ne- nea neb ned nee nen ner net neu nex nna nnb nne nnn nnt nnu nra nrb nrd nre nrn nrr nrt nru nrx nta ntb ntd nte ntn ntr ntt ntu ntx nua nub nud nue nun nur nut nuu nux nxd nxt ra- raa rab rad rae ran rar rat rau rax rba rbb rbd rbe rbn rbr rbt rbu rbx rda rdb rdd rde rdn rdr rdt rdu rdx re- rea reb red ree ren rer ret reu rex rna rnb rnd rnn rnr rnt rnu rra rrb rrd rrn rrr rrt rru rta rtb rtd rte rtn rtr rtt rtu rtx rua rub rud rue run rur rut ruu rux rxr t-x taa tab tad tae tan tar tat tau tax tba tbb tbd tbe tbn tbr tbt tbu tda tdb tdd tde tdn tdr tdt tdu tdx te- tea teb ted tee ten ter tet teu tex tna tnb tnd tne tnn tnr tnt tnx tra trb trd tre trn trr trt tru trx tta ttb ttd tte ttn ttr ttt ttu ttx tua tub tud tue tun tur tut tuu tux txe txn txt txu ua- uaa uab uad uae uan uar uat uau uba ubb ube ubn ubr ubt ubu ubx uda udb udd ude udn udr udt udu udx uea ueb ued uee uen uer uet un- una unb und une unn unr unt unu unx ur- ura urb urd ure urn urr urt uru urx uta utb utd ute utn utr utt utu utx uua uue uun uur uut uuu uxb uxr uxt uxu xaa xad xan xar xat xau xbe xbr xbx xda xdb xde xdr xdt xed xee xen xer xet xeu xex xna xnu xrd xrt xrx xtr xtx xue xun xxx