a-a a-b a-i aaa aab aad aae aag aai aas ab- aba abb abd abe abg abi abs ad- ada adb add ade adg adi ads aea aeb aed aee aeg aei aes ag- aga agb agd age agg agi ags ai- aia aib aid aie aig aii ais as- asa asb asd ase asg asi ass baa bab bad bae bag bai bas bba bbb bbd bbe bbg bbi bbs bda bdb bdd bde bdg bdi bds be- bea beb bed bee beg bei bes bga bgb bgd bge bgg bgi bgs bi- bia bib bid bie big bii bis bsa bsb bsd bse bsg bsi bss daa dab dad dae dag dai das dba dbb dbd dbe dbg dbi dbs dda ddb ddd dde ddg ddi dds de- dea deb ded dee deg dei des dga dgd dge dgg dgi dgs di- dia dib did die dig dii dis dsa dsb dsd dse dsg dsi dss eaa eab ead eae eag eai eas eba ebb ebd ebe ebg ebi ebs ed- eda edb edd ede edg edi eds eea eeb eed eee eeg ees ega egb egd ege egg egi egs eia eib eid eie eig eii eis es- esa esb esd ese esg esi ess g-d gaa gab gad gae gag gai gas gba gbd gbe gbg gbi gbs gda gdb gdd gde gdi gds ge- gea geb ged gee geg gei ges gga ggb ggd ggg ggi ggs gia gib gid gie gig gii gis gsa gsb gsd gse gsg gsi gss i-d ia- iaa iab iad iae iag iai ias iba ibb ibd ibe ibg ibi ibs ida idb idd ide idg idi ids ie- iea ied iee ieg iei ies iga igb igd ige igg igi igs iia iib iid iie iii iis is- isa isb isd ise isg isi iss saa sab sad sae sag sai sas sba sbb sbd sbe sbg sbi sbs sda sdb sdd sde sdg sdi sds se- sea seb sed see seg sei ses sga sgb sgd sge sgg sgi sgs sia sib sid sie sig sii sis ss- ssa ssb ssd sse ssg ssi sss