-al -ol a-a a-b a-c a-t aaa aab aac aae aaf aal aao aap aat ab- aba abb abc abe abf abl abo abp abt ac- aca acb acc ace acf acl aco acp act aea aeb aec aee aef ael aeo aep aet af- afa afb afc afe aff afl afo afp aft al- ala alb alc ale alf all alo alp alt aoa aob aoc aoe aof aol aoo aop aot ap- apa apb apc ape apf apl apo app apt at- ata atb atc ate atf atl ato atp att b-p baa bab bac bae baf bal bao bap bat bba bbb bbc bbe bbf bbl bbo bbp bbt bca bcb bcc bce bcf bcl bco bcp bct be- bea beb bec bee bef bel beo bep bet bfa bfb bfc bfe bff bfl bfo bfp bft bla blb blc ble blf bll blo blp blt boa bob boc boe bof bol boo bop bot bpa bpb bpc bpe bpf bpl bpo bpp bpt bta btb btc bte btf btl bto btp btt c-- caa cab cac cae caf cal cao cap cat cba cbb cbc cbe cbf cbl cbo cbp cbt cca ccb ccc cce ccf ccl cco ccp cct ce- cea ceb cec cee cef cel ceo cep cet cfa cfb cfc cfe cff cfl cfo cfp cft cl- cla clb clc cle clf cll clo clp clt co- coa cob coc coe cof col coo cop cot cpa cpb cpc cpe cpf cpl cpo cpp cpt cta ctb ctc cte ctf ctl cto ctp ctt eaa eab eac eae eaf eal eao eap eat eba ebb ebc ebe ebf ebl ebo ebp ebt ec- eca ecb ecc ece ecf ecl eco ect eea eeb eec eee eef eel eeo eep eet ef- efa efb efc efe eff efl efo efp eft ela elb elc ele elf ell elo elp elt eo- eoa eob eoc eoe eof eol eoo eop eot ep- epa epb epc epe epf epl epo epp ept eta etb etc ete etf etl eto etp ett faa fab fac fae faf fal fao fap fat fba fbb fbc fbe fbf fbl fbo fbp fbt fca fcb fcc fce fcf fcl fco fcp fct fea feb fec fee fef fel feo fep fet ffa ffc ffe fff ffl ffo ffp fft fla flb flc fle flf fll flo flp flt foa fob foc foe fof fol foo fop fot fpa fpb fpc fpe fpl fpo fpp fpt fta ftb ftc fte ftf ftl fto ftp ftt l-p la- laa lab lac lae laf lal lao lap lat lba lbb lbc lbe lbf lbl lbo lbp lbt lca lcb lcc lce lcf lcl lco lcp lct lea leb lec lee lef lel leo lep let lfa lfb lfc lfe lff lfl lfo lfp lft lla llb llc lle llf lll llo llp llt loa lob loc loe lof lol loo lop lot lpa lpb lpc lpe lpf lpl lpo lpp lpt lta ltb ltc lte ltf ltl lto ltp ltt oaa oab oac oae oaf oal oao oap oat ob- oba obb obc obe obf obl obo obp obt oc- oca ocb occ ocf ocl oco ocp oct oea oeb oec oee oef oel oeo oep oet of- ofa ofb ofc ofe off ofl ofo ofp oft ola olb olc ole olf oll olo olp olt oo- ooa oob ooc oof ool ooo oop oot op- opa opb opc ope opf opl opo opp opt ot- ota otb otc ote otf otl oto otp ott p-p paa pab pac pae paf pal pao pap pat pba pbb pbc pbe pbf pbl pbo pbp pbt pca pcb pcc pce pcf pcl pco pcp pct pea peb pec pee pef pel peo pep pet pfa pfb pfc pfe pff pfl pfo pfp pft pla plb plc ple plf pll plo plp plt poa pob poc poe pof pol poo pop pot ppa ppb ppc ppe ppf ppl ppo ppp ppt pt- pta ptb ptc pte ptf ptl pto ptp ptt taa tab tac tae taf tal tao tap tat tba tbb tbc tbe tbf tbl tbo tbp tbt tca tcb tcc tce tcf tcl tco tcp tct te- tea teb tec tee tef tel teo tep tet tfa tfb tfc tfe tff tfl tfo tfp tft tla tlc tle tlf tll tlo tlp tlt to- toa tob toc toe tof tol too top tot tpa tpb tpc tpe tpf tpl tpo tpp tpt tta ttb ttc tte ttf ttl tto ttp ttt