a-a a-b aaa aab aad aae aag aas ab- aba abb abd abe abg abs ad- ada adb add ade adg ads aea aeb aed aee aeg aes ag- aga agb agd age agg ags as- asa asb asd ase asg ass baa bab bad bae bag bas bba bbb bbd bbe bbg bbs bda bdb bdd bde bdg bds be- bea beb bed bee beg bes bga bgb bgd bge bgg bgs bsa bsb bsd bse bsg bss daa dab dad dae dag das dba dbb dbd dbe dbg dbs dda ddb ddd dde ddg dds de- dea deb ded dee deg des dga dgd dge dgg dgs dsa dsb dsd dse dsg dss eaa eab ead eae eag eas eba ebb ebd ebe ebg ebs ed- eda edb edd ede edg eds eea eeb eed eee eeg ees ega egb egd ege egg egs es- esa esb esd ese esg ess g-d gaa gab gad gae gag gas gba gbd gbe gbg gbs gda gdb gdd gde gds ge- gea geb ged gee geg ges gga ggb ggd ggg ggs gsa gsb gsd gse gsg gss saa sab sad sae sag sas sba sbb sbd sbe sbg sbs sda sdb sdd sde sdg sds se- sea seb sed see seg ses sga sgb sgd sge sgg sgs ss- ssa ssb ssd sse ssg sss