-ic a-a a-b a-c a-i aaa aab aac aad aae aag aai aao aas ab- aba abb abc abd abe abg abi abo abs ac- aca acb acc acd ace acg aci aco acs ad- ada adb adc add ade adg adi ado ads aea aeb aec aed aee aeg aei aeo aes ag- aga agb agc agd age agg agi ago ags ai- aia aib aic aid aie aig aii aio ais aoa aob aoc aod aoe aog aoi aoo aos as- asa asb asc asd ase asg asi aso ass baa bab bac bad bae bag bai bao bas bba bbb bbc bbd bbe bbg bbi bbo bbs bca bcb bcc bcd bce bcg bci bco bcs bda bdb bdc bdd bde bdg bdi bdo bds be- bea beb bec bed bee beg bei beo bes bga bgb bgc bgd bge bgg bgi bgo bgs bi- bia bib bic bid bie big bii bio bis boa bob boc bod boe bog boi boo bos bsa bsb bsc bsd bse bsg bsi bso bss c-- caa cab cac cad cae cag cai cao cas cba cbb cbc cbd cbe cbg cbi cbo cbs cca ccb ccc ccd cce ccg cci cco ccs cda cdb cdc cdd cde cdg cdi cdo cds ce- cea ceb cec ced cee ceg cei ceo ces cga cgb cgc cgd cge cgg cgi cgo cgs ci- cia cib cic cid cie cig cii cio cis co- coa cob coc cod coe cog coi coo cos csa csb csc csd cse csg csi cso css daa dab dac dad dae dag dai dao das dba dbb dbc dbd dbe dbg dbi dbo dbs dca dcb dcc dcd dce dcg dci dco dcs dda ddb ddc ddd dde ddg ddi ddo dds de- dea deb dec ded dee deg dei deo des dga dgc dgd dge dgg dgi dgs di- dia dib dic did die dig dii dio dis doa dob doc dod doe dog doi doo dos dsa dsb dsc dsd dse dsg dsi dso dss eaa eab eac ead eae eag eai eao eas eba ebb ebc ebd ebe ebg ebi ebo ebs ec- eca ecb ecc ecd ece ecg eci eco ecs ed- eda edb edc edd ede edg edi edo eds eea eeb eec eed eee eeg eeo ees ega egb egc egd ege egg egi ego egs eia eib eic eid eie eig eii eio eis eo- eoa eob eoc eod eoe eog eoi eoo eos es- esa esb esc esd ese esg esi eso ess g-d gaa gab gac gad gae gag gai gao gas gba gbc gbd gbe gbg gbi gbo gbs gca gcb gcc gcd gce gcg gci gco gcs gda gdb gdc gdd gde gdi gdo gds ge- gea geb gec ged gee geg gei geo ges gga ggb ggc ggd ggg ggi ggo ggs gia gib gic gid gie gig gii gio gis goa gob goc god goe gog goi goo gos gsa gsb gsc gsd gse gsg gsi gso gss i-d ia- iaa iab iac iad iae iag iai iao ias iba ibb ibc ibd ibe ibg ibi ibo ibs ica icb icc icd ice icg ici ico ics ida idb idc idd ide idg idi ido ids ie- iea iec ied iee ieg iei ies iga igb igc igd ige igg igi igo igs iia iib iic iid iie iii iio iis io- ioa iob ioc iod ioe iog ioi ioo ios is- isa isb isc isd ise isg isi iso iss o-i oaa oab oac oad oae oag oai oao oas ob- oba obb obc obd obe obg obi obo obs oc- oca ocb occ ocd ocg oci oco ocs oda odb odc odd ode odg odi odo ods oea oeb oec oed oee oeg oei oeo oes oga ogc ogd oge ogg ogi ogo ogs oia oib oic oid oie oii oio ois oo- ooa oob ooc ood oog ooi ooo oos os- osa osb osc osd ose osg osi oso oss saa sab sac sad sae sag sai sao sas sba sbb sbc sbd sbe sbg sbi sbo sbs sca scb scc scd sce scg sci sco scs sda sdb sdc sdd sde sdg sdi sdo sds se- sea seb sec sed see seg sei seo ses sga sgb sgc sgd sge sgg sgi sgo sgs sia sib sic sid sie sig sii sio sis soa sob soc sod soe sog soi soo sos ss- ssa ssb ssc ssd sse ssg ssi sso sss