a-a a-b a-q aaa aab aad aao aaq aar aau ab- aba abb abd abo abq abr abu ad- ada adb add ado adq adr adu aoa aob aod aoo aor aou aqa aqo aqr ar- ara arb ard aro arq arr aru au- aua aub aud auo aur b-u baa bab bad bao baq bar bau bba bbb bbd bbo bbq bbr bbu bda bdb bdd bdo bdq bdr bdu boa bob bod boo boq bor bou bqd bra brb brd bro brq brr bru bua bub bud buo bur buu daa dab dad dao daq dar dau dba dbb dbd dbo dbq dbr dbu dda ddb ddd ddo ddq ddr ddu doa dob dod doo doq dor dou dqa dra drb drd dro drq drr dru dua dub dud duo dur oaa oab oad oao oaq oar oau ob- oba obb obd obo obr obu oda odb odd odo odr odu oo- ooa oob ood ooo oor oqb oqo or- ora orb ord oro orr oru ou- oua oud ouo our qaa qad qar qau qba qbd qbq qda qdb qdr qoo qor qqq qqu qra qrb qru qu- qua qud quo qur ra- raa rab rad rao raq rar rau rba rbb rbd rbo rbr rbu rda rdb rdd rdo rdr rdu roa rob rod roo ror rou rra rrb rrd rrq rrr rru rua rub rud ruo rur ruu ua- uaa uab uad uao uaq uar uau uba ubb ubo ubr ubu uda udb udd udo udr udu uoa uob uod uoo uor ur- ura urb urd uro urr uru uua uur uuu