-ic a-a a-b a-c a-i a-z aaa aab aac aag aai aao aas aaz ab- aba abb abc abg abi abo abs abz ac- aca acb acc acg aci aco acs acz ag- aga agb agc agg agi ago ags agz ai- aia aib aic aig aii aio ais aiz aoa aob aoc aog aoi aoo aos as- asa asb asc asg asi aso ass asz az- aza azb azg azi azo azs azz baa bab bac bag bai bao bas baz bba bbb bbc bbg bbi bbo bbs bca bcb bcc bcg bci bco bcs bcz bga bgb bgc bgg bgi bgo bgs bgz bi- bia bib bic big bii bio bis biz boa bob boc bog boi boo bos boz bsa bsb bsc bsg bsi bso bss bza bzo bzs bzz c-- caa cab cac cag cai cao cas caz cba cbb cbc cbg cbi cbo cbs cbz cca ccb ccc ccg cci cco ccs ccz cga cgb cgc cgg cgi cgo cgs ci- cia cib cic cig cii cio cis co- coa cob coc cog coi coo cos coz csa csb csc csg csi cso css csz cz- czc czo gaa gab gac gag gai gao gas gaz gba gbc gbg gbi gbo gbs gbz gca gcb gcc gcg gci gco gcs gga ggb ggc ggg ggi ggo ggs ggz gia gib gic gig gii gio gis giz goa gob goc gog goi goo gos goz gsa gsb gsc gsg gsi gso gss gza gzo ia- iaa iab iac iag iai iao ias iaz iba ibb ibc ibg ibi ibo ibs ibz ica icb icc icg ici ico ics icz iga igb igc igg igi igo igs iia iib iic iii iio iis io- ioa iob ioc iog ioi ioo ios is- isa isb isc isg isi iso iss iza izi izo izz o-i oaa oab oac oag oai oao oas ob- oba obb obc obg obi obo obs oc- oca ocb occ ocg oci oco ocs ocz oga ogc ogg ogi ogo ogs oia oib oic oii oio ois oiz oo- ooa oob ooc oog ooi ooo oos os- osa osb osc osg osi oso oss oza ozo ozs ozz saa sab sac sag sai sao sas saz sba sbb sbc sbg sbi sbo sbs sca scb scc scg sci sco scs sga sgb sgc sgg sgi sgo sgs sia sib sic sig sii sio sis soa sob soc sog soi soo sos soz ss- ssa ssb ssc ssg ssi sso sss ssz sza szi z-g zaa zab zac zag zai zao zas zaz zbb zbc zbs zco zcs zgb zgg zgi zgs zia zib zig zio zis ziz zo- zoa zob zoc zog zoi zoo zos zsa zsg zsi zsz zzs zzz