-al -ol a-a a-b a-c a-t aaa aab aac aag aal aao aas aat ab- aba abb abc abg abl abo abs abt ac- aca acb acc acg acl aco acs act ag- aga agb agc agg agl ago ags agt al- ala alb alc alg all alo als alt aoa aob aoc aog aol aoo aos aot as- asa asb asc asg asl aso ass ast at- ata atb atc atg atl ato ats att baa bab bac bag bal bao bas bat bba bbb bbc bbg bbl bbo bbs bbt bca bcb bcc bcg bcl bco bcs bct bga bgb bgc bgg bgl bgo bgs bgt bla blb blc blg bll blo bls blt boa bob boc bog bol boo bos bot bsa bsb bsc bsg bsl bso bss bst bta btb btc btg btl bto bts btt c-- caa cab cac cag cal cao cas cat cba cbb cbc cbg cbl cbo cbs cbt cca ccb ccc ccg ccl cco ccs cct cga cgb cgc cgg cgl cgo cgs cgt cl- cla clb clc clg cll clo cls clt co- coa cob coc cog col coo cos cot csa csb csc csg csl cso css cst cta ctb ctc ctg ctl cto cts ctt gaa gab gac gag gal gao gas gat gba gbc gbg gbl gbo gbs gbt gca gcb gcc gcg gcl gco gcs gct gga ggb ggc ggg ggo ggs ggt gla glb glc glg gll glo gls glt goa gob goc gog gol goo gos got gsa gsb gsc gsg gsl gso gss gst gta gtb gtc gtg gtl gto gts gtt la- laa lab lac lag lal lao las lat lba lbb lbc lbg lbl lbo lbs lbt lca lcb lcc lcg lcl lco lcs lct lga lgb lgc lgg lgl lgo lgs lgt lla llb llc llg lll llo lls llt loa lob loc log lol loo los lot lsa lsb lsc lsg lsl lso lss lst lta ltb ltc ltg ltl lto lts ltt oaa oab oac oag oal oao oas oat ob- oba obb obc obg obl obo obs obt oc- oca ocb occ ocg ocl oco ocs oct oga ogc ogg ogl ogo ogs ogt ola olb olc olg oll olo ols olt oo- ooa oob ooc oog ool ooo oos oot os- osa osb osc osg osl oso oss ost ot- ota otb otc otg otl oto ots ott saa sab sac sag sal sao sas sat sba sbb sbc sbg sbl sbo sbs sbt sca scb scc scg scl sco scs sct sga sgb sgc sgg sgl sgo sgs sgt sla slb slc slg sll slo sls slt soa sob soc sog sol soo sos sot ss- ssa ssb ssc ssg ssl sso sss sst sta stb stc stg stl sto sts stt taa tab tac tag tal tao tas tat tba tbb tbc tbg tbl tbo tbs tbt tca tcb tcc tcg tcl tco tcs tct tga tgb tgc tgg tgl tgo tgs tgt tla tlc tlg tll tlo tls tlt to- toa tob toc tog tol too tos tot tsa tsb tsc tsg tsl tso tss tst tta ttb ttc ttg ttl tto tts ttt