a-a a-b a-t aaa aab aad aae aag aao aat ab- aba abb abd abe abg abo abt ad- ada adb add ade adg ado adt aea aeb aed aee aeg aeo aet ag- aga agb agd age agg ago agt aoa aob aod aoe aog aoo aot at- ata atb atd ate atg ato att baa bab bad bae bag bao bat bba bbb bbd bbe bbg bbo bbt bda bdb bdd bde bdg bdo bdt be- bea beb bed bee beg beo bet bga bgb bgd bge bgg bgo bgt boa bob bod boe bog boo bot bta btb btd bte btg bto btt daa dab dad dae dag dao dat dba dbb dbd dbe dbg dbo dbt dda ddb ddd dde ddg ddo ddt de- dea deb ded dee deg deo det dga dgd dge dgg dgt doa dob dod doe dog doo dot dta dtb dtd dte dtg dto dtt eaa eab ead eae eag eao eat eba ebb ebd ebe ebg ebo ebt ed- eda edb edd ede edg edo edt eea eeb eed eee eeg eeo eet ega egb egd ege egg ego egt eo- eoa eob eod eoe eog eoo eot eta etb etd ete etg eto ett g-d gaa gab gad gae gag gao gat gba gbd gbe gbg gbo gbt gda gdb gdd gde gdo gdt ge- gea geb ged gee geg geo get gga ggb ggd ggg ggo ggt goa gob god goe gog goo got gta gtb gtd gte gtg gto gtt oaa oab oad oae oag oao oat ob- oba obb obd obe obg obo obt oda odb odd ode odg odo odt oea oeb oed oee oeg oeo oet oga ogd oge ogg ogo ogt oo- ooa oob ood oog ooo oot ot- ota otb otd ote otg oto ott taa tab tad tae tag tao tat tba tbb tbd tbe tbg tbo tbt tda tdb tdd tde tdg tdo tdt te- tea teb ted tee teg teo tet tga tgb tge tgg tgo tgt to- toa tob tod toe tog too tot tta ttb ttd tte ttg tto ttt