a-a a-b a-t aaa aab aad aae aag aan aao aat ab- aba abb abd abe abg abn abo abt ad- ada adb add ade adg adn ado adt aea aeb aed aee aeg aen aeo aet ag- aga agb agd age agg agn ago agt an- ana anb and ane ang ann ano ant aoa aob aod aoe aog aon aoo aot at- ata atb atd ate atg atn ato att baa bab bad bae bag ban bao bat bba bbb bbd bbe bbg bbn bbo bbt bda bdb bdd bde bdg bdo bdt be- bea beb bed bee beg ben beo bet bga bgb bgd bge bgg bgn bgo bgt bna bnb bnd bne bng bnn bno bnt boa bob bod boe bog bon boo bot bta btb btd bte btg btn bto btt daa dab dad dae dag dan dao dat dba dbb dbd dbe dbg dbn dbo dbt dda ddb ddd dde ddg ddn ddo ddt de- dea deb ded dee deg den deo det dga dgd dge dgg dgn dgt dna dnb dnd dne dng dnn dno dnt doa dob dod doe dog don doo dot dta dtb dtd dte dtg dtn dto dtt eaa eab ead eae eag ean eao eat eba ebb ebd ebe ebg ebn ebo ebt ed- eda edb edd ede edg edn edo edt eea eeb eed eee eeg een eeo eet ega egb egd ege egg egn ego egt en- ena enb end ene eng enn eno ent eo- eoa eob eod eoe eog eon eoo eot eta etb etd ete etg etn eto ett g-d gaa gab gad gae gag gan gao gat gba gbd gbe gbg gbn gbo gbt gda gdb gdd gde gdn gdo gdt ge- gea geb ged gee geg gen geo get gga ggb ggd ggg ggn ggo ggt gna gnb gnd gne gnn gno gnt goa gob god goe gog gon goo got gta gtb gtd gte gtg gtn gto gtt naa nab nad nae nag nan nao nat nba nbb nbd nbe nbg nbn nbo nbt nda ndb ndd nde ndg ndn ndo ndt ne- nea neb ned nee neg nen neo net nga ngb ngd nge ngg ngn ngo ngt nna nnb nne nng nnn nno nnt no- noa nob nod noe nog non noo not nta ntb ntd nte ntg ntn nto ntt oaa oab oad oae oag oan oao oat ob- oba obb obd obe obg obn obo obt oda odb odd ode odg odn odo odt oea oeb oed oee oeg oen oeo oet oga ogd oge ogg ogn ogo ogt on- ona onb ond one ong onn ono ont oo- ooa oob ood oog oon ooo oot ot- ota otb otd ote otg otn oto ott taa tab tad tae tag tan tao tat tba tbb tbd tbe tbg tbn tbo tbt tda tdb tdd tde tdg tdn tdo tdt te- tea teb ted tee teg ten teo tet tga tgb tge tgg tgn tgo tgt tna tnb tnd tne tng tnn tno tnt to- toa tob tod toe tog ton too tot tta ttb ttd tte ttg ttn tto ttt