a-a a-b a-c a-t aaa aab aac aae aaj aan aao aas aat ab- aba abb abc abe abj abn abo abs abt ac- aca acb acc ace acj acn aco acs act aea aeb aec aee aej aen aeo aes aet aja ajb ajc aje ajj ajn ajo ajs ajt an- ana anb anc ane anj ann ano ans ant aoa aob aoc aoe aoj aon aoo aos aot as- asa asb asc ase asj asn aso ass ast at- ata atb atc ate atn ato ats att baa bab bac bae baj ban bao bas bat bba bbb bbc bbe bbn bbo bbs bbt bca bcb bcc bce bcj bcn bco bcs bct be- bea beb bec bee ben beo bes bet bja bjc bjj bjn bjs bjt bna bnb bnc bne bnj bnn bno bns bnt boa bob boc boe boj bon boo bos bot bsa bsb bsc bse bsj bsn bso bss bst bta btb btc bte btn bto bts btt c-- c-j caa cab cac cae caj can cao cas cat cba cbb cbc cbe cbj cbn cbo cbs cbt cca ccb ccc cce ccj ccn cco ccs cct ce- cea ceb cec cee cej cen ceo ces cet cja cjb cjc cjs cn- cna cnb cnc cne cnj cnn cno cns cnt co- coa cob coc coe coj con coo cos cot csa csb csc cse csj csn cso css cst cta ctb ctc cte ctn cto cts ctt eaa eab eac eae eaj ean eao eas eat eba ebb ebc ebe ebj ebn ebo ebs ebt ec- eca ecb ecc ece ecj ecn eco ecs ect eea eeb eec eee een eeo ees eet eja ejc ejo ejt en- ena enb enc ene enn eno ens ent eo- eoa eob eoc eoe eon eoo eos eot es- esa esb esc ese esn eso ess est eta etb etc ete etj etn eto ets ett jaa jab jac jae jaj jan jao jas jat jba jbc jbj jbo jbs jbt jca jcb jcc jce jco jcs jct jea jeb jec jee jej jen jeo jes jet jja jjb jjc jjj jjs jna jnc jne jnj jnn jno jns jnt joa job joc joe joj jon joo jos jot jsa jsb jsc jse jsj jsn jso jss jst jta jtb jtc jte jtn jts jtt naa nab nac nae naj nan nao nas nat nba nbb nbc nbe nbn nbo nbs nbt nca ncb ncc nce ncn nco ncs nct ne- nea neb nec nee nej nen neo nes net nja njc nje njn njs nna nnb nnc nne nnn nno nns nnt no- noa nob noc noe noj non noo nos not nsa nsb nsc nse nsn nso nss nst nta ntb ntc nte ntn nto nts ntt oaa oab oac oae oaj oan oao oas oat ob- oba obb obc obe obj obn obo obs obt oc- oca ocb occ ocj ocn oco ocs oct oea oeb oec oee oen oeo oes oet oja ojb ojc oje ojo ojs on- ona onb onc one onj onn ono ons ont oo- ooa oob ooc oon ooo oos oot os- osa osb osc ose osj osn oso oss ost ot- ota otb otc ote otn oto ots ott saa sab sac sae saj san sao sas sat sba sbb sbc sbe sbj sbn sbo sbs sbt sca scb scc sce scj scn sco scs sct se- sea seb sec see sej sen seo ses set sja sjb sjc sje sjj sjs sjt sna snb snc sne snj snn sno sns snt soa sob soc soe soj son soo sos sot ss- ssa ssb ssc sse ssj ssn sso sss sst sta stb stc ste stj stn sto sts stt taa tab tac tae taj tan tao tas tat tba tbb tbc tbe tbj tbn tbo tbs tbt tca tcb tcc tce tcj tcn tco tcs tct te- tea teb tec tee tej ten teo tes tet tjc tje tjo tjs tna tnb tnc tne tnn tno tns tnt to- toa tob toc toe toj ton too tos tot tsa tsb tsc tse tsj tsn tso tss tst tta ttb ttc tte ttn tto tts ttt