-al -ol a-a a-b a-c a-t aaa aab aac aae aak aal aao aap aat ab- aba abb abc abe abk abl abo abp abt ac- aca acb acc ace ack acl aco acp act aea aeb aec aee aek ael aeo aep aet aka akb akc ake akk akl ako akp al- ala alb alc ale alk all alo alp alt aoa aob aoc aoe aok aol aoo aop aot ap- apa apb apc ape apk apl apo app apt at- ata atb atc ate atl ato atp att b-p baa bab bac bae bak bal bao bap bat bba bbb bbc bbe bbk bbl bbo bbp bbt bca bcb bcc bce bck bcl bco bcp bct be- bea beb bec bee bek bel beo bep bet bka bkb bkc bke bkk bkl bko bkp bkt bla blb blc ble blk bll blo blp blt boa bob boc boe bok bol boo bop bot bpa bpb bpc bpe bpl bpo bpp bpt bta btb btc bte btk btl bto btp btt c-- caa cab cac cae cak cal cao cap cat cba cbb cbc cbe cbk cbl cbo cbp cbt cca ccb ccc cce cck ccl cco ccp cct ce- cea ceb cec cee cek cel ceo cep cet cka ckb ckc cko ckt cl- cla clb clc cle clk cll clo clp clt co- coa cob coc coe cok col coo cop cot cpa cpb cpc cpe cpk cpl cpo cpp cpt cta ctb ctc cte ctk ctl cto ctp ctt eaa eab eac eae eak eal eao eap eat eba ebb ebc ebe ebk ebl ebo ebp ebt ec- eca ecb ecc ece eck ecl eco ect eea eeb eec eee eek eel eeo eep eet eka ekb ekc eke ekl eko ekp ekt ela elb elc ele elk ell elo elp elt eo- eoa eob eoc eoe eok eol eoo eop eot ep- epa epb epc epe epl epo epp ept eta etb etc ete etk etl eto etp ett k-t ka- kaa kab kac kae kak kal kao kap kat kba kbb kbc kbe kbk kbl kbo kbp kca kcb kcc kce kck kcl kcp kct ke- kea keb kec kee kek kel keo kep ket kkb kkc kke kkk kkl kkp kkt kl- kla klb klc klo klt koa kob koc koe kok kol koo kop kot kpa kpc kpe kpk kpl kpo kpp kpt kta ktb ktc kte ktk ktl kto ktp ktt l-p la- laa lab lac lae lak lal lao lap lat lba lbb lbc lbe lbk lbl lbo lbp lbt lca lcb lcc lce lck lcl lco lcp lct lea leb lec lee lek lel leo lep let lka lkb lkl lkp lkt lla llb llc lle llk lll llo llp llt loa lob loc loe lok lol loo lop lot lpa lpb lpc lpe lpk lpl lpo lpp lpt lta ltb ltc lte ltk ltl lto ltp ltt oaa oab oac oae oak oal oao oap oat ob- oba obb obc obe obk obl obo obp obt oc- oca ocb occ ock ocl oco ocp oct oea oeb oec oee oel oeo oep oet oka okb okc oke okk okl oko okp ola olb olc ole olk oll olo olp olt oo- ooa oob ooc ook ool ooo oop oot op- opa opb opc ope opk opl opo opp opt ot- ota otb otc ote otk otl oto otp ott p-p paa pab pac pae pak pal pao pap pat pba pbb pbc pbe pbk pbl pbo pbp pbt pca pcb pcc pce pck pcl pco pcp pct pea peb pec pee pek pel peo pep pet pka pkb pkc pke pkl pko pkp pkt pla plb plc ple plk pll plo plp plt poa pob poc poe pok pol poo pop pot ppa ppb ppc ppe ppk ppl ppo ppp ppt pt- pta ptb ptc pte ptk ptl pto ptp ptt taa tab tac tae tak tal tao tap tat tba tbb tbc tbe tbk tbl tbo tbp tbt tca tcb tcc tce tck tcl tco tcp tct te- tea teb tec tee tek tel teo tep tet tka tkb tkc tke tkk tkl tko tkp tkt tla tlc tle tlk tll tlo tlp tlt to- toa tob toc toe tok tol too top tot tpa tpb tpc tpe tpk tpl tpo tpp tpt tta ttb ttc tte ttk ttl tto ttp ttt