a-a a-b a-i a-z aaa aab aad aai aao aar aaz ab- aba abb abd abi abo abr abz ad- ada adb add adi ado adr adz ai- aia aib aid aii aio air aiz aoa aob aod aoi aoo aor ar- ara arb ard ari aro arr arz az- aza azb azd azi azo azz baa bab bad bai bao bar baz bba bbb bbd bbi bbo bbr bda bdb bdd bdi bdo bdr bdz bi- bia bib bid bii bio bir biz boa bob bod boi boo bor boz bra brb brd bri bro brr brz bza bzd bzo bzr bzz daa dab dad dai dao dar daz dba dbb dbd dbi dbo dbr dbz dda ddb ddd ddi ddo ddr ddz di- dia dib did dii dio dir diz doa dob dod doi doo dor doz dra drb drd dri dro drr drz dza dzb dzd dzi dzo dzr i-d ia- iaa iab iad iai iao iar iaz iba ibb ibd ibi ibo ibr ibz ida idb idd idi ido idr iia iib iid iii iio iir io- ioa iob iod ioi ioo ior ir- ira irb ird iri iro irr iza izi izo izz o-i oaa oab oad oai oao oar ob- oba obb obd obi obo obr oda odb odd odi odo odr oia oib oid oii oio oir oiz oo- ooa oob ood ooi ooo oor or- ora orb ord ori oro orr orz oza ozo ozz ra- raa rab rad rai rao rar raz rba rbb rbd rbi rbo rbr rda rdb rdd rdi rdo rdr ria rib rid rii rio rir riz roa rob rod roi roo ror roz rra rrb rrd rri rrr rza rzb rzo zaa zab zad zai zao zar zaz zbb zbr zia zib zid zio zir ziz zo- zoa zob zod zoi zoo zor zro zzr zzz