-al a-a a-b a-t aaa aab aae aal aat aau aax ab- aba abb abe abl abt abu abx aea aeb aee ael aet aeu aex al- ala alb ale all alt alu alx at- ata atb ate atl att atu atx au- aua aub aue aul aut aux ax- axa axe axl axt axx b-u baa bab bae bal bat bau bax bba bbb bbe bbl bbt bbu bbx be- bea beb bee bel bet beu bex bla blb ble bll blt blu blx bta btb bte btl btt btu btx bua bub bue bul but buu bux bxb bxl bxx eaa eab eae eal eat eau eax eba ebb ebe ebl ebt ebu ebx eea eeb eee eel eet eex ela elb ele ell elt elu elx eta etb ete etl ett etu etx eu- eua eub eue eul eut eux ex- exa exe exl ext exu exx la- laa lab lae lal lat lau lax lba lbb lbe lbl lbt lbu lbx lea leb lee lel let leu lex lla llb lle lll llt llu lta ltb lte ltl ltt ltu ltx lua lub lue lul lut luu lux lxx t-x taa tab tae tal tat tau tax tba tbb tbe tbl tbt tbu te- tea teb tee tel tet teu tex tla tle tll tlt tlu tlx tta ttb tte ttl ttt ttu ttx tua tub tue tul tut tuu tux txe txl txt txu ua- uaa uab uae ual uat uau uba ubb ube ubl ubt ubu ubx uea ueb uee uel uet ula ulb ule ull ult ulu uta utb ute utl utt utu utx uua uue uut uuu uxb uxt uxu xaa xal xat xau xbe xbl xbx xee xel xet xeu xex xla xlb xlt xtx xue xul xxl xxx