a-a a-b a-c a-t aaa aab aac aae aaj aan aas aat ab- aba abb abc abe abj abn abs abt ac- aca acb acc ace acj acn acs act aea aeb aec aee aej aen aes aet aja ajb ajc aje ajj ajn ajs ajt an- ana anb anc ane anj ann ans ant as- asa asb asc ase asj asn ass ast at- ata atb atc ate atn ats att baa bab bac bae baj ban bas bat bba bbb bbc bbe bbn bbs bbt bca bcb bcc bce bcj bcn bcs bct be- bea beb bec bee ben bes bet bja bjc bjj bjn bjs bjt bna bnb bnc bne bnj bnn bns bnt bsa bsb bsc bse bsj bsn bss bst bta btb btc bte btn bts btt c-- c-j caa cab cac cae caj can cas cat cba cbb cbc cbe cbj cbn cbs cbt cca ccb ccc cce ccj ccn ccs cct ce- cea ceb cec cee cej cen ces cet cja cjb cjc cjs cn- cna cnb cnc cne cnj cnn cns cnt csa csb csc cse csj csn css cst cta ctb ctc cte ctn cts ctt eaa eab eac eae eaj ean eas eat eba ebb ebc ebe ebj ebn ebs ebt ec- eca ecb ecc ece ecj ecn ecs ect eea eeb eec eee een ees eet eja ejc ejt en- ena enb enc ene enn ens ent es- esa esb esc ese esn ess est eta etb etc ete etj etn ets ett jaa jab jac jae jaj jan jas jat jba jbc jbj jbs jbt jca jcb jcc jce jcs jct jea jeb jec jee jej jen jes jet jja jjb jjc jjj jjs jna jnc jne jnj jnn jns jnt jsa jsb jsc jse jsj jsn jss jst jta jtb jtc jte jtn jts jtt naa nab nac nae naj nan nas nat nba nbb nbc nbe nbn nbs nbt nca ncb ncc nce ncn ncs nct ne- nea neb nec nee nej nen nes net nja njc nje njn njs nna nnb nnc nne nnn nns nnt nsa nsb nsc nse nsn nss nst nta ntb ntc nte ntn nts ntt saa sab sac sae saj san sas sat sba sbb sbc sbe sbj sbn sbs sbt sca scb scc sce scj scn scs sct se- sea seb sec see sej sen ses set sja sjb sjc sje sjj sjs sjt sna snb snc sne snj snn sns snt ss- ssa ssb ssc sse ssj ssn sss sst sta stb stc ste stj stn sts stt taa tab tac tae taj tan tas tat tba tbb tbc tbe tbj tbn tbs tbt tca tcb tcc tce tcj tcn tcs tct te- tea teb tec tee tej ten tes tet tjc tje tjs tna tnb tnc tne tnn tns tnt tsa tsb tsc tse tsj tsn tss tst tta ttb ttc tte ttn tts ttt