a-a a-b a-c a-t aaa aab aac aaj aak aao aat ab- aba abb abc abj abk abo abt ac- aca acb acc acj ack aco act aja ajb ajc ajj ajk ajo ajt aka akb akc akj akk ako aoa aob aoc aoj aok aoo aot at- ata atb atc ato att baa bab bac baj bak bao bat bba bbb bbc bbk bbo bbt bca bcb bcc bcj bck bco bct bja bjc bjj bjk bjt bka bkb bkc bkk bko bkt boa bob boc boj bok boo bot bta btb btc btk bto btt c-- c-j caa cab cac caj cak cao cat cba cbb cbc cbj cbk cbo cbt cca ccb ccc ccj cck cco cct cja cjb cjc cjk cka ckb ckc cko ckt co- coa cob coc coj cok coo cot cta ctb ctc ctk cto ctt jaa jab jac jaj jak jao jat jba jbc jbj jbk jbo jbt jca jcb jcc jck jco jct jja jjb jjc jjj jjk jka jkb jkk jko jkt joa job joc joj jok joo jot jta jtb jtc jtk jtt k-t ka- kaa kab kac kaj kak kao kat kba kbb kbc kbk kbo kca kcb kcc kck kct kjb kjc kkb kkc kkk kkt koa kob koc kok koo kot kta ktb ktc ktj ktk kto ktt oaa oab oac oaj oak oao oat ob- oba obb obc obj obk obo obt oc- oca ocb occ ocj ock oco oct oja ojb ojc ojo oka okb okc okj okk oko oo- ooa oob ooc ook ooo oot ot- ota otb otc otk oto ott taa tab tac taj tak tao tat tba tbb tbc tbj tbk tbo tbt tca tcb tcc tcj tck tco tct tjc tjo tka tkb tkc tkk tko tkt to- toa tob toc toj tok too tot tta ttb ttc ttk tto ttt