-al a-a a-b aaa aab aae aal aas aau aax ab- aba abb abe abl abs abu abx aea aeb aee ael aes aeu aex al- ala alb ale all als alu alx as- asa asb ase asl ass asu asx au- aua aub aue aul aus aux ax- axa axe axl axs axx b-u baa bab bae bal bas bau bax bba bbb bbe bbl bbs bbu bbx be- bea beb bee bel bes beu bex bla blb ble bll bls blu blx bsa bsb bse bsl bss bsu bsx bua bub bue bul bus buu bux bxb bxl bxx eaa eab eae eal eas eau eax eba ebb ebe ebl ebs ebu ebx eea eeb eee eel ees eex ela elb ele ell els elu elx es- esa esb ese esl ess esu esx eu- eua eub eue eul eus eux ex- exa exe exl exs exu exx la- laa lab lae lal las lau lax lba lbb lbe lbl lbs lbu lbx lea leb lee lel les leu lex lla llb lle lll lls llu lsa lsb lse lsl lss lsu lua lub lue lul lus luu lux lxx saa sab sae sal sas sau sax sba sbb sbe sbl sbs sbu sbx se- sea seb see sel ses seu sex sla slb sle sll sls slu slx ss- ssa ssb sse ssl sss ssu ssx sua sub sue sul sus suu sux sxl sxs sxu ua- uaa uab uae ual uas uau uba ubb ube ubl ubs ubu ubx uea ueb uee uel ues ula ulb ule ull uls ulu usa usb use usl uss usu usx uua uue uus uuu uxb uxu xaa xal xas xau xbe xbl xbx xee xel xes xeu xex xla xlb xls xsa xsb xsl xss xue xul xus xxl xxx