-al -ol a-a a-b a-c a-t aaa aab aac aak aal aao aap aas aat ab- aba abb abc abk abl abo abp abs abt ac- aca acb acc ack acl aco acp acs act aka akb akc akk akl ako akp aks al- ala alb alc alk all alo alp als alt aoa aob aoc aok aol aoo aop aos aot ap- apa apb apc apk apl apo app aps apt as- asa asb asc ask asl aso asp ass ast at- ata atb atc atl ato atp ats att b-p baa bab bac bak bal bao bap bas bat bba bbb bbc bbk bbl bbo bbp bbs bbt bca bcb bcc bck bcl bco bcp bcs bct bka bkb bkc bkk bkl bko bkp bks bkt bla blb blc blk bll blo blp bls blt boa bob boc bok bol boo bop bos bot bpa bpb bpc bpl bpo bpp bps bpt bsa bsb bsc bsk bsl bso bsp bss bst bta btb btc btk btl bto btp bts btt c-- caa cab cac cak cal cao cap cas cat cba cbb cbc cbk cbl cbo cbp cbs cbt cca ccb ccc cck ccl cco ccp ccs cct cka ckb ckc cko cks ckt cl- cla clb clc clk cll clo clp cls clt co- coa cob coc cok col coo cop cos cot cpa cpb cpc cpk cpl cpo cpp cps cpt csa csb csc csk csl cso csp css cst cta ctb ctc ctk ctl cto ctp cts ctt k-t ka- kaa kab kac kak kal kao kap kas kat kba kbb kbc kbk kbl kbo kbp kbs kca kcb kcc kck kcl kcp kcs kct kkb kkc kkk kkl kkp kks kkt kl- kla klb klc klo kls klt koa kob koc kok kol koo kop kos kot kpa kpc kpk kpl kpo kpp kps kpt ksa ksb ksc ksk ksl kso ksp kss kst kta ktb ktc ktk ktl kto ktp kts ktt l-p la- laa lab lac lak lal lao lap las lat lba lbb lbc lbk lbl lbo lbp lbs lbt lca lcb lcc lck lcl lco lcp lcs lct lka lkb lkl lkp lks lkt lla llb llc llk lll llo llp lls llt loa lob loc lok lol loo lop los lot lpa lpb lpc lpk lpl lpo lpp lps lpt lsa lsb lsc lsk lsl lso lsp lss lst lta ltb ltc ltk ltl lto ltp lts ltt oaa oab oac oak oal oao oap oas oat ob- oba obb obc obk obl obo obp obs obt oc- oca ocb occ ock ocl oco ocp ocs oct oka okb okc okk okl oko okp oks ola olb olc olk oll olo olp ols olt oo- ooa oob ooc ook ool ooo oop oos oot op- opa opb opc opk opl opo opp ops opt os- osa osb osc osk osl oso osp oss ost ot- ota otb otc otk otl oto otp ots ott p-p paa pab pac pak pal pao pap pas pat pba pbb pbc pbk pbl pbo pbp pbs pbt pca pcb pcc pck pcl pco pcp pcs pct pka pkb pkc pkl pko pkp pks pkt pla plb plc plk pll plo plp pls plt poa pob poc pok pol poo pop pos pot ppa ppb ppc ppk ppl ppo ppp pps ppt ps- psa psb psc psk psl pso psp pss pst pt- pta ptb ptc ptk ptl pto ptp pts ptt saa sab sac sak sal sao sap sas sat sba sbb sbc sbk sbl sbo sbp sbs sbt sca scb scc sck scl sco scp scs sct sk- ska skb skc skk skl sko skp sks skt sla slb slc slk sll slo slp sls slt soa sob soc sok sol soo sop sos sot spa spb spc spk spl spo spp sps spt ss- ssa ssb ssc ssk ssl sso ssp sss sst sta stb stc stk stl sto stp sts stt taa tab tac tak tal tao tap tas tat tba tbb tbc tbk tbl tbo tbp tbs tbt tca tcb tcc tck tcl tco tcp tcs tct tka tkb tkc tkk tkl tko tkp tks tkt tla tlc tlk tll tlo tlp tls tlt to- toa tob toc tok tol too top tos tot tpa tpb tpc tpk tpl tpo tpp tps tpt tsa tsb tsc tsk tsl tso tsp tss tst tta ttb ttc ttk ttl tto ttp tts ttt