-al -ol a-a a-b a-t aaa aab aae aal aao aap aat aax ab- aba abb abe abl abo abp abt abx aea aeb aee ael aeo aep aet aex al- ala alb ale all alo alp alt alx aoa aob aoe aol aoo aop aot aox ap- apa apb ape apl apo app apt apx at- ata atb ate atl ato atp att atx ax- axa axe axl axo axp axt axx b-p baa bab bae bal bao bap bat bax bba bbb bbe bbl bbo bbp bbt bbx be- bea beb bee bel beo bep bet bex bla blb ble bll blo blp blt blx boa bob boe bol boo bop bot box bpa bpb bpe bpl bpo bpp bpt bpx bta btb bte btl bto btp btt btx bxb bxl bxo bxx eaa eab eae eal eao eap eat eax eba ebb ebe ebl ebo ebp ebt ebx eea eeb eee eel eeo eep eet eex ela elb ele ell elo elp elt elx eo- eoa eob eoe eol eoo eop eot ep- epa epb epe epl epo epp ept epx eta etb ete etl eto etp ett etx ex- exa exe exl exo exp ext exx l-p la- laa lab lae lal lao lap lat lax lba lbb lbe lbl lbo lbp lbt lbx lea leb lee lel leo lep let lex lla llb lle lll llo llp llt loa lob loe lol loo lop lot lox lpa lpb lpe lpl lpo lpp lpt lpx lta ltb lte ltl lto ltp ltt ltx lxo lxx oaa oab oae oal oao oap oat oax ob- oba obb obe obl obo obp obt obx oea oeb oee oel oeo oep oet oex ola olb ole oll olo olp olt oo- ooa oob ool ooo oop oot oox op- opa opb ope opl opo opp opt opx ot- ota otb ote otl oto otp ott ox- oxa oxb oxo oxt oxx p-p paa pab pae pal pao pap pat pax pba pbb pbe pbl pbo pbp pbt pbx pea peb pee pel peo pep pet pex pla plb ple pll plo plp plt plx poa pob poe pol poo pop pot pox ppa ppb ppe ppl ppo ppp ppt ppx pt- pta ptb pte ptl pto ptp ptt ptx pxe pxl pxt t-x taa tab tae tal tao tap tat tax tba tbb tbe tbl tbo tbp tbt te- tea teb tee tel teo tep tet tex tla tle tll tlo tlp tlt tlx to- toa tob toe tol too top tot tox tpa tpb tpe tpl tpo tpp tpt tpx tta ttb tte ttl tto ttp ttt ttx txe txl txt xaa xal xap xat xbe xbl xbx xee xel xep xet xex xla xlb xlt xoa xoo xop xot xox xpa xpb xpe xpl xpo xpp xpt xtp xtx xxl xxo xxp xxx