-er a-a a-b a-i a-z aaa aab aad aae aai aao aar aaz ab- aba abb abd abe abi abo abr abz ad- ada adb add ade adi ado adr adz aea aeb aed aee aei aeo aer aez ai- aia aib aid aie aii aio air aiz aoa aob aod aoe aoi aoo aor ar- ara arb ard are ari aro arr arz az- aza azb azd aze azi azo azz baa bab bad bae bai bao bar baz bba bbb bbd bbe bbi bbo bbr bda bdb bdd bde bdi bdo bdr bdz be- bea beb bed bee bei beo ber bez bi- bia bib bid bie bii bio bir biz boa bob bod boe boi boo bor boz bra brb brd bre bri bro brr brz bza bzd bze bzo bzr bzz daa dab dad dae dai dao dar daz dba dbb dbd dbe dbi dbo dbr dbz dda ddb ddd dde ddi ddo ddr ddz de- dea deb ded dee dei deo der dez di- dia dib did die dii dio dir diz doa dob dod doe doi doo dor doz dra drb drd dre dri dro drr drz dza dzb dzd dze dzi dzo dzr eaa eab ead eae eai eao ear eaz eba ebb ebd ebe ebi ebo ebr ed- eda edb edd ede edi edo edr eea eeb eed eee eeo eer eia eib eid eie eii eio eir eo- eoa eob eod eoe eoi eoo eor era erb erd ere eri ero err erz eze ezo ezr ezz i-d ia- iaa iab iad iae iai iao iar iaz iba ibb ibd ibe ibi ibo ibr ibz ida idb idd ide idi ido idr ie- iea ied iee iei ier iia iib iid iie iii iio iir io- ioa iob iod ioe ioi ioo ior ir- ira irb ird ire iri iro irr iza ize izi izo izz o-i oaa oab oad oae oai oao oar ob- oba obb obd obe obi obo obr oda odb odd ode odi odo odr oea oeb oed oee oei oeo oer oia oib oid oie oii oio oir oiz oo- ooa oob ood ooi ooo oor or- ora orb ord ore ori oro orr orz oza oze ozo ozz ra- raa rab rad rae rai rao rar raz rba rbb rbd rbe rbi rbo rbr rda rdb rdd rde rdi rdo rdr re- rea reb red ree rei reo rer rez ria rib rid rie rii rio rir riz roa rob rod roe roi roo ror roz rra rrb rrd rri rrr rza rzb rze rzo zaa zab zad zai zao zar zaz zbb zbr zea zeb zed zee zeo zer zez zia zib zid zie zio zir ziz zo- zoa zob zod zoe zoi zoo zor zro zzr zzz