-al -ol a-a a-b a-c a-t aaa aab aac aae aal aao aap aat ab- aba abb abc abe abl abo abp abt ac- aca acb acc ace acl aco acp act aea aeb aec aee ael aeo aep aet al- ala alb alc ale all alo alp alt aoa aob aoc aoe aol aoo aop aot ap- apa apb apc ape apl apo app apt at- ata atb atc ate atl ato atp att b-p baa bab bac bae bal bao bap bat bba bbb bbc bbe bbl bbo bbp bbt bca bcb bcc bce bcl bco bcp bct be- bea beb bec bee bel beo bep bet bla blb blc ble bll blo blp blt boa bob boc boe bol boo bop bot bpa bpb bpc bpe bpl bpo bpp bpt bta btb btc bte btl bto btp btt c-- caa cab cac cae cal cao cap cat cba cbb cbc cbe cbl cbo cbp cbt cca ccb ccc cce ccl cco ccp cct ce- cea ceb cec cee cel ceo cep cet cl- cla clb clc cle cll clo clp clt co- coa cob coc coe col coo cop cot cpa cpb cpc cpe cpl cpo cpp cpt cta ctb ctc cte ctl cto ctp ctt eaa eab eac eae eal eao eap eat eba ebb ebc ebe ebl ebo ebp ebt ec- eca ecb ecc ece ecl eco ect eea eeb eec eee eel eeo eep eet ela elb elc ele ell elo elp elt eo- eoa eob eoc eoe eol eoo eop eot ep- epa epb epc epe epl epo epp ept eta etb etc ete etl eto etp ett l-p la- laa lab lac lae lal lao lap lat lba lbb lbc lbe lbl lbo lbp lbt lca lcb lcc lce lcl lco lcp lct lea leb lec lee lel leo lep let lla llb llc lle lll llo llp llt loa lob loc loe lol loo lop lot lpa lpb lpc lpe lpl lpo lpp lpt lta ltb ltc lte ltl lto ltp ltt oaa oab oac oae oal oao oap oat ob- oba obb obc obe obl obo obp obt oc- oca ocb occ ocl oco ocp oct oea oeb oec oee oel oeo oep oet ola olb olc ole oll olo olp olt oo- ooa oob ooc ool ooo oop oot op- opa opb opc ope opl opo opp opt ot- ota otb otc ote otl oto otp ott p-p paa pab pac pae pal pao pap pat pba pbb pbc pbe pbl pbo pbp pbt pca pcb pcc pce pcl pco pcp pct pea peb pec pee pel peo pep pet pla plb plc ple pll plo plp plt poa pob poc poe pol poo pop pot ppa ppb ppc ppe ppl ppo ppp ppt pt- pta ptb ptc pte ptl pto ptp ptt taa tab tac tae tal tao tap tat tba tbb tbc tbe tbl tbo tbp tbt tca tcb tcc tce tcl tco tcp tct te- tea teb tec tee tel teo tep tet tla tlc tle tll tlo tlp tlt to- toa tob toc toe tol too top tot tpa tpb tpc tpe tpl tpo tpp tpt tta ttb ttc tte ttl tto ttp ttt