a-a a-b a-t aaa aab aae aaj aak aao aat ab- aba abb abe abj abk abo abt aea aeb aee aej aek aeo aet aja ajb aje ajj ajk ajo ajt aka akb ake akj akk ako aoa aob aoe aoj aok aoo aot at- ata atb ate ato att baa bab bae baj bak bao bat bba bbb bbe bbk bbo bbt be- bea beb bee bek beo bet bja bjj bjk bjt bka bkb bke bkk bko bkt boa bob boe boj bok boo bot bta btb bte btk bto btt eaa eab eae eaj eak eao eat eba ebb ebe ebj ebk ebo ebt eea eeb eee eek eeo eet eja ejo ejt eka ekb eke eko ekt eo- eoa eob eoe eok eoo eot eta etb ete etj etk eto ett jaa jab jae jaj jak jao jat jba jbj jbk jbo jbt jea jeb jee jej jek jeo jet jja jjb jjj jjk jka jkb jkk jko jkt joa job joe joj jok joo jot jta jtb jte jtk jtt k-t ka- kaa kab kae kaj kak kao kat kba kbb kbe kbk kbo ke- kea keb kee kek keo ket kjb kje kkb kke kkk kkt koa kob koe kok koo kot kta ktb kte ktj ktk kto ktt oaa oab oae oaj oak oao oat ob- oba obb obe obj obk obo obt oea oeb oee oeo oet oja ojb oje ojo oka okb oke okj okk oko oo- ooa oob ook ooo oot ot- ota otb ote otk oto ott taa tab tae taj tak tao tat tba tbb tbe tbj tbk tbo tbt te- tea teb tee tej tek teo tet tje tjo tka tkb tke tkk tko tkt to- toa tob toe toj tok too tot tta ttb tte ttk tto ttt