-er a-a a-b a-i aaa aab aad aae aai aao aar aau ab- aba abb abd abe abi abo abr abu ad- ada adb add ade adi ado adr adu aea aeb aed aee aei aeo aer aeu ai- aia aib aid aie aii aio air aiu aoa aob aod aoe aoi aoo aor aou ar- ara arb ard are ari aro arr aru au- aua aub aud aue aui auo aur b-u baa bab bad bae bai bao bar bau bba bbb bbd bbe bbi bbo bbr bbu bda bdb bdd bde bdi bdo bdr bdu be- bea beb bed bee bei beo ber beu bi- bia bib bid bie bii bio bir biu boa bob bod boe boi boo bor bou bra brb brd bre bri bro brr bru bua bub bud bue bui buo bur buu daa dab dad dae dai dao dar dau dba dbb dbd dbe dbi dbo dbr dbu dda ddb ddd dde ddi ddo ddr ddu de- dea deb ded dee dei deo der deu di- dia dib did die dii dio dir diu doa dob dod doe doi doo dor dou dra drb drd dre dri dro drr dru dua dub dud due dui duo dur eaa eab ead eae eai eao ear eau eba ebb ebd ebe ebi ebo ebr ebu ed- eda edb edd ede edi edo edr edu eea eeb eed eee eeo eer eia eib eid eie eii eio eir eiu eo- eoa eob eod eoe eoi eoo eor eou era erb erd ere eri ero err eru eu- eua eub eud eue eui eur i-d ia- iaa iab iad iae iai iao iar iau iba ibb ibd ibe ibi ibo ibr ibu ida idb idd ide idi ido idr idu ie- iea ied iee iei ier iia iib iid iie iii iio iir iiu io- ioa iob iod ioe ioi ioo ior iou ir- ira irb ird ire iri iro irr iru iu- iua iub iud iue iui iur o-i oaa oab oad oae oai oao oar oau ob- oba obb obd obe obi obo obr obu oda odb odd ode odi odo odr odu oea oeb oed oee oei oeo oer oia oib oid oie oii oio oir oiu oo- ooa oob ood ooi ooo oor or- ora orb ord ore ori oro orr oru ou- oua oud oue oui ouo our ra- raa rab rad rae rai rao rar rau rba rbb rbd rbe rbi rbo rbr rbu rda rdb rdd rde rdi rdo rdr rdu re- rea reb red ree rei reo rer reu ria rib rid rie rii rio rir roa rob rod roe roi roo ror rou rra rrb rrd rri rrr rru rua rub rud rue rui ruo rur ruu ua- uaa uab uad uae uai uao uar uau uba ubb ube ubi ubo ubr ubu uda udb udd ude udi udo udr udu uea ueb ued uee uei uer uia uib uid uie uii uio uir uiu uoa uob uod uoe uoo uor ur- ura urb urd ure uri uro urr uru uua uue uur uuu