a-a a-b a-t aaa aab aae aag aak aan aao aat ab- aba abb abe abg abk abn abo abt aea aeb aee aeg aek aen aeo aet ag- aga agb age agg agk agn ago agt aka akb ake akg akk akn ako an- ana anb ane ang ank ann ano ant aoa aob aoe aog aok aon aoo aot at- ata atb ate atg atn ato att baa bab bae bag bak ban bao bat bba bbb bbe bbg bbk bbn bbo bbt be- bea beb bee beg bek ben beo bet bga bgb bge bgg bgk bgn bgo bgt bka bkb bke bkg bkk bkn bko bkt bna bnb bne bng bnk bnn bno bnt boa bob boe bog bok bon boo bot bta btb bte btg btk btn bto btt eaa eab eae eag eak ean eao eat eba ebb ebe ebg ebk ebn ebo ebt eea eeb eee eeg eek een eeo eet ega egb ege egg egn ego egt eka ekb eke ekg eko ekt en- ena enb ene eng enk enn eno ent eo- eoa eob eoe eog eok eon eoo eot eta etb ete etg etk etn eto ett gaa gab gae gag gak gan gao gat gba gbe gbg gbk gbn gbo gbt ge- gea geb gee geg gek gen geo get gga ggb ggg ggn ggo ggt gka gkb gkn gko gkt gna gnb gne gnn gno gnt goa gob goe gog gok gon goo got gta gtb gte gtg gtk gtn gto gtt k-t ka- kaa kab kae kag kak kan kao kat kba kbb kbe kbk kbn kbo ke- kea keb kee keg kek ken keo ket kga kgb kgo kkb kke kkk kkn kkt kn- kna kne kng knk knn kno knt koa kob koe kog kok kon koo kot kta ktb kte ktg ktk ktn kto ktt naa nab nae nag nak nan nao nat nba nbb nbe nbg nbk nbn nbo nbt ne- nea neb nee neg nek nen neo net nga ngb nge ngg ngk ngn ngo ngt nka nke nkk nkn nko nkt nna nnb nne nng nnk nnn nno nnt no- noa nob noe nog nok non noo not nta ntb nte ntg ntk ntn nto ntt oaa oab oae oag oak oan oao oat ob- oba obb obe obg obk obn obo obt oea oeb oee oeg oen oeo oet oga oge ogg ogn ogo ogt oka okb oke okg okk oko on- ona onb one ong onk onn ono ont oo- ooa oob oog ook oon ooo oot ot- ota otb ote otg otk otn oto ott taa tab tae tag tak tan tao tat tba tbb tbe tbg tbk tbn tbo tbt te- tea teb tee teg tek ten teo tet tga tgb tge tgg tgk tgn tgo tgt tka tkb tke tkg tkk tko tkt tna tnb tne tng tnk tnn tno tnt to- toa tob toe tog tok ton too tot tta ttb tte ttg ttk ttn tto ttt