-al -ol a-a a-b a-c a-t aaa aab aac aag aal aao aar aat ab- aba abb abc abg abl abo abr abt ac- aca acb acc acg acl aco acr act ag- aga agb agc agg agl ago agr agt al- ala alb alc alg all alo alr alt aoa aob aoc aog aol aoo aor aot ar- ara arb arc arg arl aro arr art at- ata atb atc atg atl ato atr att baa bab bac bag bal bao bar bat bba bbb bbc bbg bbl bbo bbr bbt bca bcb bcc bcg bcl bco bcr bct bga bgb bgc bgg bgl bgo bgr bgt bla blb blc blg bll blo blr blt boa bob boc bog bol boo bor bot bra brb brg brl bro brr brt bta btb btc btg btl bto btr btt c-- caa cab cac cag cal cao car cat cba cbb cbc cbg cbl cbo cbr cbt cca ccb ccc ccg ccl cco ccr cct cga cgb cgc cgg cgl cgo cgr cgt cl- cla clb clc clg cll clo clr clt co- coa cob coc cog col coo cor cot cra crb crc crg crl cro crr crt cta ctb ctc ctg ctl cto ctr ctt gaa gab gac gag gal gao gar gat gba gbc gbg gbl gbo gbr gbt gca gcb gcc gcg gcl gco gcr gct gga ggb ggc ggg ggo ggr ggt gla glb glc glg gll glo glr glt goa gob goc gog gol goo gor got gra grb grc grg grl gro grr grt gta gtb gtc gtg gtl gto gtr gtt la- laa lab lac lag lal lao lar lat lba lbb lbc lbg lbl lbo lbr lbt lca lcb lcc lcg lcl lco lcr lct lga lgb lgc lgg lgl lgo lgr lgt lla llb llc llg lll llo llr llt loa lob loc log lol loo lor lot lra lrb lrc lrg lro lrr lrt lta ltb ltc ltg ltl lto ltr ltt oaa oab oac oag oal oao oar oat ob- oba obb obc obg obl obo obr obt oc- oca ocb occ ocg ocl oco ocr oct oga ogc ogg ogl ogo ogt ola olb olc olg oll olo olt oo- ooa oob ooc oog ool ooo oor oot or- ora orb orc org orl oro orr ort ot- ota otb otc otg otl oto otr ott ra- raa rab rac rag ral rao rar rat rba rbb rbc rbg rbl rbo rbr rbt rca rcb rcc rcg rcl rco rcr rct rga rgb rgc rgg rgo rgr rgt rla rlc rlg rll rlo rlr rlt roa rob roc rog rol roo ror rot rra rrb rrc rrg rrl rrr rrt rta rtb rtc rtg rtl rto rtr rtt taa tab tac tag tal tao tar tat tba tbb tbc tbg tbl tbo tbr tbt tca tcb tcc tcg tcl tco tcr tct tga tgb tgc tgg tgl tgo tgr tgt tla tlc tlg tll tlo tlr tlt to- toa tob toc tog tol too tor tot tra trb trc trg trl tro trr trt tta ttb ttc ttg ttl tto ttr ttt