a-a a-b a-c a-t aaa aab aac aaj aao aas aat ab- aba abb abc abj abo abs abt ac- aca acb acc acj aco acs act aja ajb ajc ajj ajo ajs ajt aoa aob aoc aoj aoo aos aot as- asa asb asc asj aso ass ast at- ata atb atc ato ats att baa bab bac baj bao bas bat bba bbb bbc bbo bbs bbt bca bcb bcc bcj bco bcs bct bja bjc bjj bjs bjt boa bob boc boj boo bos bot bsa bsb bsc bsj bso bss bst bta btb btc bto bts btt c-- c-j caa cab cac caj cao cas cat cba cbb cbc cbj cbo cbs cbt cca ccb ccc ccj cco ccs cct cja cjb cjc cjs co- coa cob coc coj coo cos cot csa csb csc csj cso css cst cta ctb ctc cto cts ctt jaa jab jac jaj jao jas jat jba jbc jbj jbo jbs jbt jca jcb jcc jco jcs jct jja jjb jjc jjj jjs joa job joc joj joo jos jot jsa jsb jsc jsj jso jss jst jta jtb jtc jts jtt oaa oab oac oaj oao oas oat ob- oba obb obc obj obo obs obt oc- oca ocb occ ocj oco ocs oct oja ojb ojc ojo ojs oo- ooa oob ooc ooo oos oot os- osa osb osc osj oso oss ost ot- ota otb otc oto ots ott saa sab sac saj sao sas sat sba sbb sbc sbj sbo sbs sbt sca scb scc scj sco scs sct sja sjb sjc sjj sjs sjt soa sob soc soj soo sos sot ss- ssa ssb ssc ssj sso sss sst sta stb stc stj sto sts stt taa tab tac taj tao tas tat tba tbb tbc tbj tbo tbs tbt tca tcb tcc tcj tco tcs tct tjc tjo tjs to- toa tob toc toj too tos tot tsa tsb tsc tsj tso tss tst tta ttb ttc tto tts ttt