a-a a-b a-c a-t aaa aab aac aae aaj aan aao aat ab- aba abb abc abe abj abn abo abt ac- aca acb acc ace acj acn aco act aea aeb aec aee aej aen aeo aet aja ajb ajc aje ajj ajn ajo ajt an- ana anb anc ane anj ann ano ant aoa aob aoc aoe aoj aon aoo aot at- ata atb atc ate atn ato att baa bab bac bae baj ban bao bat bba bbb bbc bbe bbn bbo bbt bca bcb bcc bce bcj bcn bco bct be- bea beb bec bee ben beo bet bja bjc bjj bjn bjt bna bnb bnc bne bnj bnn bno bnt boa bob boc boe boj bon boo bot bta btb btc bte btn bto btt c-- c-j caa cab cac cae caj can cao cat cba cbb cbc cbe cbj cbn cbo cbt cca ccb ccc cce ccj ccn cco cct ce- cea ceb cec cee cej cen ceo cet cja cjb cjc cn- cna cnb cnc cne cnj cnn cno cnt co- coa cob coc coe coj con coo cot cta ctb ctc cte ctn cto ctt eaa eab eac eae eaj ean eao eat eba ebb ebc ebe ebj ebn ebo ebt ec- eca ecb ecc ece ecj ecn eco ect eea eeb eec eee een eeo eet eja ejc ejo ejt en- ena enb enc ene enn eno ent eo- eoa eob eoc eoe eon eoo eot eta etb etc ete etj etn eto ett jaa jab jac jae jaj jan jao jat jba jbc jbj jbo jbt jca jcb jcc jce jco jct jea jeb jec jee jej jen jeo jet jja jjb jjc jjj jna jnc jne jnj jnn jno jnt joa job joc joe joj jon joo jot jta jtb jtc jte jtn jtt naa nab nac nae naj nan nao nat nba nbb nbc nbe nbn nbo nbt nca ncb ncc nce ncn nco nct ne- nea neb nec nee nej nen neo net nja njc nje njn nna nnb nnc nne nnn nno nnt no- noa nob noc noe noj non noo not nta ntb ntc nte ntn nto ntt oaa oab oac oae oaj oan oao oat ob- oba obb obc obe obj obn obo obt oc- oca ocb occ ocj ocn oco oct oea oeb oec oee oen oeo oet oja ojb ojc oje ojo on- ona onb onc one onj onn ono ont oo- ooa oob ooc oon ooo oot ot- ota otb otc ote otn oto ott taa tab tac tae taj tan tao tat tba tbb tbc tbe tbj tbn tbo tbt tca tcb tcc tce tcj tcn tco tct te- tea teb tec tee tej ten teo tet tjc tje tjo tna tnb tnc tne tnn tno tnt to- toa tob toc toe toj ton too tot tta ttb ttc tte ttn tto ttt