-al -ol a-a a-b a-c a-t aaa aab aac aae aal aao aap aas aat ab- aba abb abc abe abl abo abp abs abt ac- aca acb acc ace acl aco acp acs act aea aeb aec aee ael aeo aep aes aet al- ala alb alc ale all alo alp als alt aoa aob aoc aoe aol aoo aop aos aot ap- apa apb apc ape apl apo app aps apt as- asa asb asc ase asl aso asp ass ast at- ata atb atc ate atl ato atp ats att b-p baa bab bac bae bal bao bap bas bat bba bbb bbc bbe bbl bbo bbp bbs bbt bca bcb bcc bce bcl bco bcp bcs bct be- bea beb bec bee bel beo bep bes bet bla blb blc ble bll blo blp bls blt boa bob boc boe bol boo bop bos bot bpa bpb bpc bpe bpl bpo bpp bps bpt bsa bsb bsc bse bsl bso bsp bss bst bta btb btc bte btl bto btp bts btt c-- caa cab cac cae cal cao cap cas cat cba cbb cbc cbe cbl cbo cbp cbs cbt cca ccb ccc cce ccl cco ccp ccs cct ce- cea ceb cec cee cel ceo cep ces cet cl- cla clb clc cle cll clo clp cls clt co- coa cob coc coe col coo cop cos cot cpa cpb cpc cpe cpl cpo cpp cps cpt csa csb csc cse csl cso csp css cst cta ctb ctc cte ctl cto ctp cts ctt eaa eab eac eae eal eao eap eas eat eba ebb ebc ebe ebl ebo ebp ebs ebt ec- eca ecb ecc ece ecl eco ecs ect eea eeb eec eee eel eeo eep ees eet ela elb elc ele ell elo elp els elt eo- eoa eob eoc eoe eol eoo eop eos eot ep- epa epb epc epe epl epo epp eps ept es- esa esb esc ese esl eso esp ess est eta etb etc ete etl eto etp ets ett l-p la- laa lab lac lae lal lao lap las lat lba lbb lbc lbe lbl lbo lbp lbs lbt lca lcb lcc lce lcl lco lcp lcs lct lea leb lec lee lel leo lep les let lla llb llc lle lll llo llp lls llt loa lob loc loe lol loo lop los lot lpa lpb lpc lpe lpl lpo lpp lps lpt lsa lsb lsc lse lsl lso lsp lss lst lta ltb ltc lte ltl lto ltp lts ltt oaa oab oac oae oal oao oap oas oat ob- oba obb obc obe obl obo obp obs obt oc- oca ocb occ ocl oco ocp ocs oct oea oeb oec oee oel oeo oep oes oet ola olb olc ole oll olo olp ols olt oo- ooa oob ooc ool ooo oop oos oot op- opa opb opc ope opl opo opp ops opt os- osa osb osc ose osl oso osp oss ost ot- ota otb otc ote otl oto otp ots ott p-p paa pab pac pae pal pao pap pas pat pba pbb pbc pbe pbl pbo pbp pbs pbt pca pcb pcc pce pcl pco pcp pcs pct pea peb pec pee pel peo pep pes pet pla plb plc ple pll plo plp pls plt poa pob poc poe pol poo pop pos pot ppa ppb ppc ppe ppl ppo ppp pps ppt ps- psa psb psc pse psl pso psp pss pst pt- pta ptb ptc pte ptl pto ptp pts ptt saa sab sac sae sal sao sap sas sat sba sbb sbc sbe sbl sbo sbp sbs sbt sca scb scc sce scl sco scp scs sct se- sea seb sec see sel seo sep ses set sla slb slc sle sll slo slp sls slt soa sob soc soe sol soo sop sos sot spa spb spc spe spl spo spp sps spt ss- ssa ssb ssc sse ssl sso ssp sss sst sta stb stc ste stl sto stp sts stt taa tab tac tae tal tao tap tas tat tba tbb tbc tbe tbl tbo tbp tbs tbt tca tcb tcc tce tcl tco tcp tcs tct te- tea teb tec tee tel teo tep tes tet tla tlc tle tll tlo tlp tls tlt to- toa tob toc toe tol too top tos tot tpa tpb tpc tpe tpl tpo tpp tps tpt tsa tsb tsc tse tsl tso tsp tss tst tta ttb ttc tte ttl tto ttp tts ttt