a-a a-b a-t aaa aab aae aao aas aat aaw aax ab- aba abb abe abo abs abt abw abx aea aeb aee aeo aes aet aew aex aoa aob aoe aoo aos aot aow aox as- asa asb ase aso ass ast asw asx at- ata atb ate ato ats att atw atx aw- awa awb awe awo aws awt aww ax- axa axe axo axs axt axx baa bab bae bao bas bat baw bax bba bbb bbe bbo bbs bbt bbw bbx be- bea beb bee beo bes bet bew bex boa bob boe boo bos bot bow box bsa bsb bse bso bss bst bsw bsx bta btb bte bto bts btt btw btx bwa bwb bwo bws bxb bxo bxw bxx eaa eab eae eao eas eat eaw eax eba ebb ebe ebo ebs ebt ebw ebx eea eeb eee eeo ees eet eew eex eo- eoa eob eoe eoo eos eot eow es- esa esb ese eso ess est esw esx eta etb ete eto ets ett etw etx ewa ewb ewe ewo ews ewt eww ex- exa exe exo exs ext exw exx oaa oab oae oao oas oat oaw oax ob- oba obb obe obo obs obt obw obx oea oeb oee oeo oes oet oex oo- ooa oob ooo oos oot oow oox os- osa osb ose oso oss ost osw osx ot- ota otb ote oto ots ott otw owa owb owe owo ows owt oww ox- oxa oxb oxo oxt oxx saa sab sae sao sas sat saw sax sba sbb sbe sbo sbs sbt sbw sbx se- sea seb see seo ses set sew sex soa sob soe soo sos sot sow sox ss- ssa ssb sse sso sss sst ssw ssx sta stb ste sto sts stt stw stx swa swb swe swo sws swt sxs sxt t-x taa tab tae tao tas tat taw tax tba tbb tbe tbo tbs tbt te- tea teb tee teo tes tet tew tex to- toa tob toe too tos tot tow tox tsa tsb tse tso tss tst tsw tsx tta ttb tte tto tts ttt ttw ttx twa twb twe two tws twt tww twx txe txs txt waa wab wae wao was wat waw wax wba wbb wbe wbo wbs wbt wbw wbx wea web wee weo wes wet wew wex woa wob woe woo wos wot wow wox wsa wsb wse wso wss wst wsw wsx wta wtb wto wts wtt wtw wtx wwa wwe wwo wwt www wxw xaa xas xat xbe xbx xee xes xet xew xex xoa xoo xos xot xox xsa xsb xss xst xts xtx xwa xwt xxo xxx