a-a a-b a-i a-z aaa aab aad aai aao aas aaz ab- aba abb abd abi abo abs abz ad- ada adb add adi ado ads adz ai- aia aib aid aii aio ais aiz aoa aob aod aoi aoo aos as- asa asb asd asi aso ass asz az- aza azb azd azi azo azs azz baa bab bad bai bao bas baz bba bbb bbd bbi bbo bbs bda bdb bdd bdi bdo bds bdz bi- bia bib bid bii bio bis biz boa bob bod boi boo bos boz bsa bsb bsd bsi bso bss bza bzd bzo bzs bzz daa dab dad dai dao das daz dba dbb dbd dbi dbo dbs dbz dda ddb ddd ddi ddo dds ddz di- dia dib did dii dio dis diz doa dob dod doi doo dos doz dsa dsb dsd dsi dso dss dsz dza dzb dzd dzi dzo dzs i-d ia- iaa iab iad iai iao ias iaz iba ibb ibd ibi ibo ibs ibz ida idb idd idi ido ids iia iib iid iii iio iis io- ioa iob iod ioi ioo ios is- isa isb isd isi iso iss iza izi izo izz o-i oaa oab oad oai oao oas ob- oba obb obd obi obo obs oda odb odd odi odo ods oia oib oid oii oio ois oiz oo- ooa oob ood ooi ooo oos os- osa osb osd osi oso oss oza ozo ozs ozz saa sab sad sai sao sas saz sba sbb sbd sbi sbo sbs sda sdb sdd sdi sdo sds sdz sia sib sid sii sio sis soa sob sod soi soo sos soz ss- ssa ssb ssd ssi sso sss ssz sza szd szi zaa zab zad zai zao zas zaz zbb zbs zds zia zib zid zio zis ziz zo- zoa zob zod zoi zoo zos zsa zsi zsz zzs zzz