-er a-a a-b a-q aaa aab aae aao aaq aar aau ab- aba abb abe abo abq abr abu aea aeb aee aeo aeq aer aeu aoa aob aoe aoo aor aou aqa aqo aqr ar- ara arb are aro arq arr aru au- aua aub aue auo aur b-u baa bab bae bao baq bar bau bba bbb bbe bbo bbq bbr bbu be- bea beb bee beo beq ber beu boa bob boe boo boq bor bou bqe bra brb bre bro brq brr bru bua bub bue buo bur buu eaa eab eae eao ear eau eba ebb ebe ebo ebq ebr ebu eea eeb eee eeo eer eo- eoa eob eoe eoo eoq eor eou eqa eqe eqq equ era erb ere ero erq err eru eu- eua eub eue eur oaa oab oae oao oaq oar oau ob- oba obb obe obo obr obu oea oeb oee oeo oer oo- ooa oob ooo oor oqb oqo or- ora orb ore oro orr oru ou- oua oue ouo our qaa qar qau qba qbe qbq qee qeo qoo qor qqq qqu qra qrb qre qru qu- qua que quo qur ra- raa rab rae rao raq rar rau rba rbb rbe rbo rbr rbu re- rea reb ree reo req rer reu roa rob roe roo ror rou rra rrb rrq rrr rru rua rub rue ruo rur ruu ua- uaa uab uae uao uaq uar uau uba ubb ube ubo ubr ubu uea ueb uee uer uoa uob uoe uoo uor ur- ura urb ure uro urr uru uua uue uur uuu