-al -ol a-a a-b a-c a-t aaa aab aac aak aal aao aap aat ab- aba abb abc abk abl abo abp abt ac- aca acb acc ack acl aco acp act aka akb akc akk akl ako akp al- ala alb alc alk all alo alp alt aoa aob aoc aok aol aoo aop aot ap- apa apb apc apk apl apo app apt at- ata atb atc atl ato atp att b-p baa bab bac bak bal bao bap bat bba bbb bbc bbk bbl bbo bbp bbt bca bcb bcc bck bcl bco bcp bct bka bkb bkc bkk bkl bko bkp bkt bla blb blc blk bll blo blp blt boa bob boc bok bol boo bop bot bpa bpb bpc bpl bpo bpp bpt bta btb btc btk btl bto btp btt c-- caa cab cac cak cal cao cap cat cba cbb cbc cbk cbl cbo cbp cbt cca ccb ccc cck ccl cco ccp cct cka ckb ckc cko ckt cl- cla clb clc clk cll clo clp clt co- coa cob coc cok col coo cop cot cpa cpb cpc cpk cpl cpo cpp cpt cta ctb ctc ctk ctl cto ctp ctt k-t ka- kaa kab kac kak kal kao kap kat kba kbb kbc kbk kbl kbo kbp kca kcb kcc kck kcl kcp kct kkb kkc kkk kkl kkp kkt kl- kla klb klc klo klt koa kob koc kok kol koo kop kot kpa kpc kpk kpl kpo kpp kpt kta ktb ktc ktk ktl kto ktp ktt l-p la- laa lab lac lak lal lao lap lat lba lbb lbc lbk lbl lbo lbp lbt lca lcb lcc lck lcl lco lcp lct lka lkb lkl lkp lkt lla llb llc llk lll llo llp llt loa lob loc lok lol loo lop lot lpa lpb lpc lpk lpl lpo lpp lpt lta ltb ltc ltk ltl lto ltp ltt oaa oab oac oak oal oao oap oat ob- oba obb obc obk obl obo obp obt oc- oca ocb occ ock ocl oco ocp oct oka okb okc okk okl oko okp ola olb olc olk oll olo olp olt oo- ooa oob ooc ook ool ooo oop oot op- opa opb opc opk opl opo opp opt ot- ota otb otc otk otl oto otp ott p-p paa pab pac pak pal pao pap pat pba pbb pbc pbk pbl pbo pbp pbt pca pcb pcc pck pcl pco pcp pct pka pkb pkc pkl pko pkp pkt pla plb plc plk pll plo plp plt poa pob poc pok pol poo pop pot ppa ppb ppc ppk ppl ppo ppp ppt pt- pta ptb ptc ptk ptl pto ptp ptt taa tab tac tak tal tao tap tat tba tbb tbc tbk tbl tbo tbp tbt tca tcb tcc tck tcl tco tcp tct tka tkb tkc tkk tkl tko tkp tkt tla tlc tlk tll tlo tlp tlt to- toa tob toc tok tol too top tot tpa tpb tpc tpk tpl tpo tpp tpt tta ttb ttc ttk ttl tto ttp ttt