-er a-a a-b a-q aaa aab aad aae aao aaq aar aau ab- aba abb abd abe abo abq abr abu ad- ada adb add ade ado adq adr adu aea aeb aed aee aeo aeq aer aeu aoa aob aod aoe aoo aor aou aqa aqo aqr ar- ara arb ard are aro arq arr aru au- aua aub aud aue auo aur b-u baa bab bad bae bao baq bar bau bba bbb bbd bbe bbo bbq bbr bbu bda bdb bdd bde bdo bdq bdr bdu be- bea beb bed bee beo beq ber beu boa bob bod boe boo boq bor bou bqd bqe bra brb brd bre bro brq brr bru bua bub bud bue buo bur buu daa dab dad dae dao daq dar dau dba dbb dbd dbe dbo dbq dbr dbu dda ddb ddd dde ddo ddq ddr ddu de- dea deb ded dee deo deq der deu doa dob dod doe doo doq dor dou dqa dqe dra drb drd dre dro drq drr dru dua dub dud due duo dur eaa eab ead eae eao ear eau eba ebb ebd ebe ebo ebq ebr ebu ed- eda edb edd ede edo edr edu eea eeb eed eee eeo eer eo- eoa eob eod eoe eoo eoq eor eou eqa eqe eqq equ era erb erd ere ero erq err eru eu- eua eub eud eue eur oaa oab oad oae oao oaq oar oau ob- oba obb obd obe obo obr obu oda odb odd ode odo odr odu oea oeb oed oee oeo oer oo- ooa oob ood ooo oor oqb oqo or- ora orb ord ore oro orr oru ou- oua oud oue ouo our qaa qad qar qau qba qbd qbe qbq qda qdb qdr qed qee qeo qoo qor qqq qqu qra qrb qre qru qu- qua qud que quo qur ra- raa rab rad rae rao raq rar rau rba rbb rbd rbe rbo rbr rbu rda rdb rdd rde rdo rdr rdu re- rea reb red ree reo req rer reu roa rob rod roe roo ror rou rra rrb rrd rrq rrr rru rua rub rud rue ruo rur ruu ua- uaa uab uad uae uao uaq uar uau uba ubb ube ubo ubr ubu uda udb udd ude udo udr udu uea ueb ued uee uer uoa uob uod uoe uoo uor ur- ura urb urd ure uro urr uru uua uue uur uuu