a-a a-b a-c a-z aaa aab aac aad aah aao aar aaz ab- aba abb abc abd abh abo abr abz ac- aca acb acc acd ach aco acr acz ad- ada adb adc add adh ado adr adz aha ahb ahc ahd ahh aho ahr ahz aoa aob aoc aod aoh aoo aor ar- ara arb arc ard arh aro arr arz az- aza azb azd azo azz baa bab bac bad bah bao bar baz bba bbb bbc bbd bbh bbo bbr bca bcb bcc bcd bch bco bcr bcz bda bdb bdc bdd bdh bdo bdr bdz bha bhb bhc bhd bhh bho bhr boa bob boc bod boh boo bor boz bra brb brd brh bro brr brz bza bzd bzh bzo bzr bzz c-- caa cab cac cad cah cao car caz cba cbb cbc cbd cbh cbo cbr cbz cca ccb ccc ccd cch cco ccr ccz cda cdb cdc cdd cdh cdo cdr cdz ch- cha chb chc chd chh cho chr chz co- coa cob coc cod coh coo cor coz cra crb crc crd crh cro crr crz cz- czc czd czo daa dab dac dad dah dao dar daz dba dbb dbc dbd dbh dbo dbr dbz dca dcb dcc dcd dco dcr dda ddb ddc ddd ddh ddo ddr ddz dh- dha dhb dhc dhd dhh dho dhr doa dob doc dod doh doo dor doz dra drb drc drd dro drr drz dza dzb dzd dzo dzr haa hab hac had hah hao har haz hba hbb hbc hbd hbh hbo hbr hbz hca hcb hcc hcd hch hco hcr hda hdb hdc hdd hdh hdo hdr hdz hha hhb hhc hhd hhh hho hhr hhz hoa hob hoc hod hoh hoo hor hr- hra hrb hrc hrd hrh hro hrr hrz hzd hzo oaa oab oac oad oah oao oar ob- oba obb obc obd obh obo obr oc- oca ocb occ ocd och oco ocr ocz oda odb odc odd odh odo odr oha ohc ohd ohh oho ohr oo- ooa oob ooc ood ooh ooo oor or- ora orb orc ord orh oro orr orz oza ozo ozz ra- raa rab rac rad rah rao rar raz rba rbb rbc rbd rbh rbo rbr rca rcb rcc rcd rch rco rcr rda rdb rdc rdd rdh rdo rdr rh- rha rhb rhc rhd rhh rho rhr roa rob roc rod roh roo ror roz rra rrb rrc rrd rrh rrr rza rzb rzo zaa zab zac zad zah zao zar zaz zbb zbc zbr zco zha zhc zho zhr zo- zoa zob zoc zod zoo zor zrh zro zzr zzz