-al -er -ic a-a a-b a-c a-i aaa aab aac aae aai aal aar aau aax ab- aba abb abc abe abi abl abr abu abx ac- aca acb acc ace aci acl acr acu acx aea aeb aec aee aei ael aer aeu aex ai- aia aib aic aie aii ail air aiu aix al- ala alb alc ale ali all alr alu alx ar- ara arb arc are ari arl arr aru arx au- aua aub auc aue aui aul aur aux ax- axa axe axi axl axr axx b-u baa bab bac bae bai bal bar bau bax bba bbb bbc bbe bbi bbl bbr bbu bbx bca bcb bcc bce bci bcl bcr bcu bcx be- bea beb bec bee bei bel ber beu bex bi- bia bib bic bie bii bil bir biu bix bla blb blc ble bli bll blr blu blx bra brb bre bri brl brr bru brx bua bub buc bue bui bul bur buu bux bxb bxi bxl bxx c-- caa cab cac cae cai cal car cau cax cba cbb cbc cbe cbi cbl cbr cbu cbx cca ccb ccc cce cci ccl ccr ccu ccx ce- cea ceb cec cee cei cel cer ceu cex ci- cia cib cic cie cii cil cir ciu cix cl- cla clb clc cle cli cll clr clu clx cra crb crc cre cri crl crr cru crx cua cub cuc cue cui cul cur cuu cxc cxi cxl cxr cxx eaa eab eac eae eai eal ear eau eax eba ebb ebc ebe ebi ebl ebr ebu ebx ec- eca ecb ecc ece eci ecl ecr ecu ecx eea eeb eec eee eel eer eex eia eib eic eie eii eil eir eiu eix ela elb elc ele eli ell elr elu elx era erb erc ere eri erl err eru eu- eua eub euc eue eui eul eur eux ex- exa exc exe exi exl exr exu exx ia- iaa iab iac iae iai ial iar iau iba ibb ibc ibe ibi ibl ibr ibu ibx ica icb icc ice ici icl icr icu ie- iea iec iee iei iel ier iex iia iib iic iie iii iil iir iiu iix il- ila ilb ilc ile ili ill ilr ilu ilx ir- ira irb irc ire iri irl irr iru irx iu- iua iub iuc iue iui iur ixc ixe ixi ixl la- laa lab lac lae lai lal lar lau lax lba lbb lbc lbe lbi lbl lbr lbu lbx lca lcb lcc lce lci lcl lcr lcu lcx lea leb lec lee lei lel ler leu lex lia lib lic lie lii lil lir liu lix lla llb llc lle lli lll llr llu lra lrb lrc lri lrr lru lua lub luc lue lui lul lur luu lux lxc lxi lxr lxx ra- raa rab rac rae rai ral rar rau rax rba rbb rbc rbe rbi rbl rbr rbu rbx rca rcb rcc rce rci rcl rcr rcu rcx re- rea reb rec ree rei rel rer reu rex ria rib ric rie rii ril rir rix rla rlc rle rli rll rlr rlu rra rrb rrc rri rrl rrr rru rua rub ruc rue rui rur ruu rux rxr ua- uaa uab uac uae uai ual uar uau uba ubb ubc ube ubi ubl ubr ubu ubx uca ucb ucc uce uci ucl ucr ucu uea ueb uec uee uei uel uer uia uib uic uie uii uil uir uiu ula ulb ulc ule uli ull ulr ulu ur- ura urb urc ure uri url urr uru urx uua uuc uue uur uuu uxb uxc uxr uxu xaa xac xal xar xau xbc xbe xbl xbr xbx xcb xci xcl xcr xcx xee xel xer xeu xex xia xic xie xii xiu xix xla xlb xli xlr xrc xrx xue xui xul xxi xxl xxx