-al a-a a-b a-c a-t aaa aab aac aae aal aap aas aat ab- aba abb abc abe abl abp abs abt ac- aca acb acc ace acl acp acs act aea aeb aec aee ael aep aes aet al- ala alb alc ale all alp als alt ap- apa apb apc ape apl app aps apt as- asa asb asc ase asl asp ass ast at- ata atb atc ate atl atp ats att b-p baa bab bac bae bal bap bas bat bba bbb bbc bbe bbl bbp bbs bbt bca bcb bcc bce bcl bcp bcs bct be- bea beb bec bee bel bep bes bet bla blb blc ble bll blp bls blt bpa bpb bpc bpe bpl bpp bps bpt bsa bsb bsc bse bsl bsp bss bst bta btb btc bte btl btp bts btt c-- caa cab cac cae cal cap cas cat cba cbb cbc cbe cbl cbp cbs cbt cca ccb ccc cce ccl ccp ccs cct ce- cea ceb cec cee cel cep ces cet cl- cla clb clc cle cll clp cls clt cpa cpb cpc cpe cpl cpp cps cpt csa csb csc cse csl csp css cst cta ctb ctc cte ctl ctp cts ctt eaa eab eac eae eal eap eas eat eba ebb ebc ebe ebl ebp ebs ebt ec- eca ecb ecc ece ecl ecs ect eea eeb eec eee eel eep ees eet ela elb elc ele ell elp els elt ep- epa epb epc epe epl epp eps ept es- esa esb esc ese esl esp ess est eta etb etc ete etl etp ets ett l-p la- laa lab lac lae lal lap las lat lba lbb lbc lbe lbl lbp lbs lbt lca lcb lcc lce lcl lcp lcs lct lea leb lec lee lel lep les let lla llb llc lle lll llp lls llt lpa lpb lpc lpe lpl lpp lps lpt lsa lsb lsc lse lsl lsp lss lst lta ltb ltc lte ltl ltp lts ltt p-p paa pab pac pae pal pap pas pat pba pbb pbc pbe pbl pbp pbs pbt pca pcb pcc pce pcl pcp pcs pct pea peb pec pee pel pep pes pet pla plb plc ple pll plp pls plt ppa ppb ppc ppe ppl ppp pps ppt ps- psa psb psc pse psl psp pss pst pt- pta ptb ptc pte ptl ptp pts ptt saa sab sac sae sal sap sas sat sba sbb sbc sbe sbl sbp sbs sbt sca scb scc sce scl scp scs sct se- sea seb sec see sel sep ses set sla slb slc sle sll slp sls slt spa spb spc spe spl spp sps spt ss- ssa ssb ssc sse ssl ssp sss sst sta stb stc ste stl stp sts stt taa tab tac tae tal tap tas tat tba tbb tbc tbe tbl tbp tbs tbt tca tcb tcc tce tcl tcp tcs tct te- tea teb tec tee tel tep tes tet tla tlc tle tll tlp tls tlt tpa tpb tpc tpe tpl tpp tps tpt tsa tsb tsc tse tsl tsp tss tst tta ttb ttc tte ttl ttp tts ttt