-al -er -ol a-a a-b aaa aab aae aal aao aar aas aau aax ab- aba abb abe abl abo abr abs abu abx aea aeb aee ael aeo aer aes aeu aex al- ala alb ale all alo alr als alu alx aoa aob aoe aol aoo aor aos aou aox ar- ara arb are arl aro arr ars aru arx as- asa asb ase asl aso asr ass asu asx au- aua aub aue aul auo aur aus aux ax- axa axe axl axo axr axs axx b-u baa bab bae bal bao bar bas bau bax bba bbb bbe bbl bbo bbr bbs bbu bbx be- bea beb bee bel beo ber bes beu bex bla blb ble bll blo blr bls blu blx boa bob boe bol boo bor bos bou box bra brb bre brl bro brr brs bru brx bsa bsb bse bsl bso bsr bss bsu bsx bua bub bue bul buo bur bus buu bux bxb bxl bxo bxx eaa eab eae eal eao ear eas eau eax eba ebb ebe ebl ebo ebr ebs ebu ebx eea eeb eee eel eeo eer ees eex ela elb ele ell elo elr els elu elx eo- eoa eob eoe eol eoo eor eos eou era erb ere erl ero err ers eru es- esa esb ese esl eso esr ess esu esx eu- eua eub eue eul eur eus eux ex- exa exe exl exo exr exs exu exx la- laa lab lae lal lao lar las lau lax lba lbb lbe lbl lbo lbr lbs lbu lbx lea leb lee lel leo ler les leu lex lla llb lle lll llo llr lls llu loa lob loe lol loo lor los lou lox lra lrb lro lrr lrs lru lsa lsb lse lsl lso lsr lss lsu lua lub lue lul luo lur lus luu lux lxo lxr lxx oaa oab oae oal oao oar oas oau oax ob- oba obb obe obl obo obr obs obu obx oea oeb oee oel oeo oer oes oex ola olb ole oll olo ols olu oo- ooa oob ool ooo oor oos oox or- ora orb ore orl oro orr ors oru orx os- osa osb ose osl oso osr oss osu osx ou- oua oue oul ouo our ous ox- oxa oxb oxo oxx ra- raa rab rae ral rao rar ras rau rax rba rbb rbe rbl rbo rbr rbs rbu rbx re- rea reb ree rel reo rer res reu rex rla rle rll rlo rlr rls rlu roa rob roe rol roo ror ros rou rox rra rrb rrl rrr rrs rru rsa rsb rse rsl rso rsr rss rsu rsx rua rub rue ruo rur rus ruu rux rxr rxs saa sab sae sal sao sar sas sau sax sba sbb sbe sbl sbo sbr sbs sbu sbx se- sea seb see sel seo ser ses seu sex sla slb sle sll slo slr sls slu slx soa sob soe sol soo sor sos sou sox sr- sra srb sre srl sro srr srs srx ss- ssa ssb sse ssl sso ssr sss ssu ssx sua sub sue sul suo sur sus suu sux sxl sxs sxu ua- uaa uab uae ual uao uar uas uau uba ubb ube ubl ubo ubr ubs ubu ubx uea ueb uee uel uer ues ula ulb ule ull ulo ulr uls ulu uoa uob uoe uol uoo uor uos uox ur- ura urb ure url uro urr urs uru urx usa usb use usl uso usr uss usu usx uua uue uur uus uuu uxb uxo uxr uxu xaa xal xar xas xau xbe xbl xbr xbx xee xel xer xes xeu xex xla xlb xlr xls xoa xoo xor xos xox xrx xsa xsb xsl xss xue xul xus xxl xxo xxx