-al a-a a-b a-c a-t aaa aab aac aae aal aat aau aax ab- aba abb abc abe abl abt abu abx ac- aca acb acc ace acl act acu acx aea aeb aec aee ael aet aeu aex al- ala alb alc ale all alt alu alx at- ata atb atc ate atl att atu atx au- aua aub auc aue aul aut aux ax- axa axe axl axt axx b-u baa bab bac bae bal bat bau bax bba bbb bbc bbe bbl bbt bbu bbx bca bcb bcc bce bcl bct bcu bcx be- bea beb bec bee bel bet beu bex bla blb blc ble bll blt blu blx bta btb btc bte btl btt btu btx bua bub buc bue bul but buu bux bxb bxl bxx c-- caa cab cac cae cal cat cau cax cba cbb cbc cbe cbl cbt cbu cbx cca ccb ccc cce ccl cct ccu ccx ce- cea ceb cec cee cel cet ceu cex cl- cla clb clc cle cll clt clu clx cta ctb ctc cte ctl ctt ctu ctx cua cub cuc cue cul cut cuu cxc cxl cxt cxx eaa eab eac eae eal eat eau eax eba ebb ebc ebe ebl ebt ebu ebx ec- eca ecb ecc ece ecl ect ecu ecx eea eeb eec eee eel eet eex ela elb elc ele ell elt elu elx eta etb etc ete etl ett etu etx eu- eua eub euc eue eul eut eux ex- exa exc exe exl ext exu exx la- laa lab lac lae lal lat lau lax lba lbb lbc lbe lbl lbt lbu lbx lca lcb lcc lce lcl lct lcu lcx lea leb lec lee lel let leu lex lla llb llc lle lll llt llu lta ltb ltc lte ltl ltt ltu ltx lua lub luc lue lul lut luu lux lxc lxx t-x taa tab tac tae tal tat tau tax tba tbb tbc tbe tbl tbt tbu tca tcb tcc tce tcl tct tcu tcx te- tea teb tec tee tel tet teu tex tla tlc tle tll tlt tlu tlx tta ttb ttc tte ttl ttt ttu ttx tua tub tuc tue tul tut tuu tux txe txl txt txu ua- uaa uab uac uae ual uat uau uba ubb ubc ube ubl ubt ubu ubx uca ucb ucc uce ucl uct ucu uea ueb uec uee uel uet ula ulb ulc ule ull ult ulu uta utb utc ute utl utt utu utx uua uuc uue uut uuu uxb uxc uxt uxu xaa xac xal xat xau xbc xbe xbl xbx xcb xcl xcx xee xel xet xeu xex xla xlb xlt xtc xtx xue xul xxl xxx