-er a-a a-b aaa aab aad aae aaf aah aar aau ab- aba abb abd abe abf abh abr abu ad- ada adb add ade adf adh adr adu aea aeb aed aee aef aeh aer aeu af- afa afb afd afe aff afh afr afu aha ahb ahd ahe ahf ahh ahr ahu ar- ara arb ard are arf arh arr aru au- aua aub aud aue auf auh aur b-u baa bab bad bae baf bah bar bau bba bbb bbd bbe bbf bbh bbr bbu bda bdb bdd bde bdf bdh bdr bdu be- bea beb bed bee bef beh ber beu bfa bfb bfd bfe bff bfh bfr bfu bha bhb bhd bhe bhf bhh bhr bhu bra brb brd bre brf brh brr bru bua bub bud bue buf buh bur buu daa dab dad dae daf dah dar dau dba dbb dbd dbe dbf dbh dbr dbu dda ddb ddd dde ddf ddh ddr ddu de- dea deb ded dee def deh der deu dfa dfb dfd dfe dff dfh dfr dfu dh- dha dhb dhd dhe dhf dhh dhr dhu dra drb drd dre drr dru dua dub dud due duf duh dur eaa eab ead eae eaf eah ear eau eba ebb ebd ebe ebf ebh ebr ebu ed- eda edb edd ede edf edh edr edu eea eeb eed eee eef eer ef- efa efb efd efe eff efh efr eha ehb ehd ehe ehf ehh ehr ehu era erb erd ere erf erh err eru eu- eua eub eud eue euf eur faa fab fad fae faf fah far fau fba fbb fbd fbe fbf fbh fbr fbu fda fdb fdd fde fdf fdh fdr fdu fea feb fed fee fef feh fer feu ffa ffd ffe fff ffh ffr ffu fha fhb fhe fhf fhh fhr fra frb frd fre frf frh frr fru fua fub fud fue fuf fur fuu haa hab had hae haf hah har hau hba hbb hbd hbe hbf hbh hbr hbu hda hdb hdd hde hdf hdh hdr hdu he- hea heb hed hee hef heh her heu hfa hfb hfd hfe hff hfh hfr hfu hha hhb hhd hhe hhf hhh hhr hhu hr- hra hrb hrd hre hrf hrh hrr hru hua hub hud hue huf huh hur huu ra- raa rab rad rae raf rah rar rau rba rbb rbd rbe rbf rbh rbr rbu rda rdb rdd rde rdf rdh rdr rdu re- rea reb red ree ref reh rer reu rfa rfb rfd rfe rff rfh rfr rfu rh- rha rhb rhd rhe rhf rhh rhr rhu rra rrb rrd rrf rrh rrr rru rua rub rud rue ruf ruh rur ruu ua- uaa uab uad uae uaf uah uar uau uba ubb ube ubf ubh ubr ubu uda udb udd ude udf udr udu uea ueb ued uee uef ueh uer ufa ufd ufe uff ufh ufr ufu uha uhb uhd uhe uhf uhh uhr uhu ur- ura urb urd ure urf urr uru uua uue uur uuu