a-a a-b a-i aaa aab aad aae aag aai aao aas ab- aba abb abd abe abg abi abo abs ad- ada adb add ade adg adi ado ads aea aeb aed aee aeg aei aeo aes ag- aga agb agd age agg agi ago ags ai- aia aib aid aie aig aii aio ais aoa aob aod aoe aog aoi aoo aos as- asa asb asd ase asg asi aso ass baa bab bad bae bag bai bao bas bba bbb bbd bbe bbg bbi bbo bbs bda bdb bdd bde bdg bdi bdo bds be- bea beb bed bee beg bei beo bes bga bgb bgd bge bgg bgi bgo bgs bi- bia bib bid bie big bii bio bis boa bob bod boe bog boi boo bos bsa bsb bsd bse bsg bsi bso bss daa dab dad dae dag dai dao das dba dbb dbd dbe dbg dbi dbo dbs dda ddb ddd dde ddg ddi ddo dds de- dea deb ded dee deg dei deo des dga dgd dge dgg dgi dgs di- dia dib did die dig dii dio dis doa dob dod doe dog doi doo dos dsa dsb dsd dse dsg dsi dso dss eaa eab ead eae eag eai eao eas eba ebb ebd ebe ebg ebi ebo ebs ed- eda edb edd ede edg edi edo eds eea eeb eed eee eeg eeo ees ega egb egd ege egg egi ego egs eia eib eid eie eig eii eio eis eo- eoa eob eod eoe eog eoi eoo eos es- esa esb esd ese esg esi eso ess g-d gaa gab gad gae gag gai gao gas gba gbd gbe gbg gbi gbo gbs gda gdb gdd gde gdi gdo gds ge- gea geb ged gee geg gei geo ges gga ggb ggd ggg ggi ggo ggs gia gib gid gie gig gii gio gis goa gob god goe gog goi goo gos gsa gsb gsd gse gsg gsi gso gss i-d ia- iaa iab iad iae iag iai iao ias iba ibb ibd ibe ibg ibi ibo ibs ida idb idd ide idg idi ido ids ie- iea ied iee ieg iei ies iga igb igd ige igg igi igo igs iia iib iid iie iii iio iis io- ioa iob iod ioe iog ioi ioo ios is- isa isb isd ise isg isi iso iss o-i oaa oab oad oae oag oai oao oas ob- oba obb obd obe obg obi obo obs oda odb odd ode odg odi odo ods oea oeb oed oee oeg oei oeo oes oga ogd oge ogg ogi ogo ogs oia oib oid oie oii oio ois oo- ooa oob ood oog ooi ooo oos os- osa osb osd ose osg osi oso oss saa sab sad sae sag sai sao sas sba sbb sbd sbe sbg sbi sbo sbs sda sdb sdd sde sdg sdi sdo sds se- sea seb sed see seg sei seo ses sga sgb sgd sge sgg sgi sgo sgs sia sib sid sie sig sii sio sis soa sob sod soe sog soi soo sos ss- ssa ssb ssd sse ssg ssi sso sss