-al a-a a-b aaa aab aae aal aau aax ab- aba abb abe abl abu abx aea aeb aee ael aeu aex al- ala alb ale all alu alx au- aua aub aue aul aux ax- axa axe axl axx b-u baa bab bae bal bau bax bba bbb bbe bbl bbu bbx be- bea beb bee bel beu bex bla blb ble bll blu blx bua bub bue bul buu bux bxb bxl bxx eaa eab eae eal eau eax eba ebb ebe ebl ebu ebx eea eeb eee eel eex ela elb ele ell elu elx eu- eua eub eue eul eux ex- exa exe exl exu exx la- laa lab lae lal lau lax lba lbb lbe lbl lbu lbx lea leb lee lel leu lex lla llb lle lll llu lua lub lue lul luu lux lxx ua- uaa uab uae ual uau uba ubb ube ubl ubu ubx uea ueb uee uel ula ulb ule ull ulu uua uue uuu uxb uxu xaa xal xau xbe xbl xbx xee xel xeu xex xla xlb xue xul xxl xxx