-er a-a a-b a-i a-t aaa aab aad aae aai aao aar aat aau ab- aba abb abd abe abi abo abr abt abu ad- ada adb add ade adi ado adr adt adu aea aeb aed aee aei aeo aer aet aeu ai- aia aib aid aie aii aio air ait aiu aoa aob aod aoe aoi aoo aor aot aou ar- ara arb ard are ari aro arr art aru at- ata atb atd ate ati ato atr att atu au- aua aub aud aue aui auo aur aut b-u baa bab bad bae bai bao bar bat bau bba bbb bbd bbe bbi bbo bbr bbt bbu bda bdb bdd bde bdi bdo bdr bdt bdu be- bea beb bed bee bei beo ber bet beu bi- bia bib bid bie bii bio bir bit biu boa bob bod boe boi boo bor bot bou bra brb brd bre bri bro brr brt bru bta btb btd bte bti bto btr btt btu bua bub bud bue bui buo bur but buu daa dab dad dae dai dao dar dat dau dba dbb dbd dbe dbi dbo dbr dbt dbu dda ddb ddd dde ddi ddo ddr ddt ddu de- dea deb ded dee dei deo der det deu di- dia dib did die dii dio dir dit diu doa dob dod doe doi doo dor dot dou dra drb drd dre dri dro drr drt dru dta dtb dtd dte dti dto dtr dtt dtu dua dub dud due dui duo dur dut eaa eab ead eae eai eao ear eat eau eba ebb ebd ebe ebi ebo ebr ebt ebu ed- eda edb edd ede edi edo edr edt edu eea eeb eed eee eeo eer eet eia eib eid eie eii eio eir eit eiu eo- eoa eob eod eoe eoi eoo eor eot eou era erb erd ere eri ero err ert eru eta etb etd ete eti eto etr ett etu eu- eua eub eud eue eui eur eut i-d ia- iaa iab iad iae iai iao iar iat iau iba ibb ibd ibe ibi ibo ibr ibt ibu ida idb idd ide idi ido idr idt idu ie- iea ied iee iei ier iet iia iib iid iie iii iio iir iit iiu io- ioa iob iod ioe ioi ioo ior iot iou ir- ira irb ird ire iri iro irr irt iru ita itb itd ite iti ito itt itu iu- iua iub iud iue iui iur iut o-i oaa oab oad oae oai oao oar oat oau ob- oba obb obd obe obi obo obr obt obu oda odb odd ode odi odo odr odt odu oea oeb oed oee oei oeo oer oet oia oib oid oie oii oio oir oit oiu oo- ooa oob ood ooi ooo oor oot or- ora orb ord ore ori oro orr ort oru ot- ota otb otd ote oti oto otr ott otu ou- oua oud oue oui ouo our out ra- raa rab rad rae rai rao rar rat rau rba rbb rbd rbe rbi rbo rbr rbt rbu rda rdb rdd rde rdi rdo rdr rdt rdu re- rea reb red ree rei reo rer ret reu ria rib rid rie rii rio rir rit roa rob rod roe roi roo ror rot rou rra rrb rrd rri rrr rrt rru rta rtb rtd rte rti rto rtr rtt rtu rua rub rud rue rui ruo rur rut ruu taa tab tad tae tai tao tar tat tau tba tbb tbd tbe tbi tbo tbr tbt tbu tda tdb tdd tde tdi tdo tdr tdt tdu te- tea teb ted tee tei teo ter tet teu tia tib tid tie tii tio tir tit tiu to- toa tob tod toe toi too tor tot tou tra trb trd tre tri tro trr trt tru tta ttb ttd tte tti tto ttr ttt ttu tua tub tud tue tui tuo tur tut tuu ua- uaa uab uad uae uai uao uar uat uau uba ubb ube ubi ubo ubr ubt ubu uda udb udd ude udi udo udr udt udu uea ueb ued uee uei uer uet uia uib uid uie uii uio uir uit uiu uoa uob uod uoe uoo uor uot ur- ura urb urd ure uri uro urr urt uru uta utb utd ute uti uto utr utt utu uua uue uur uut uuu