-al -er a-a a-b a-t aaa aab aae aal aar aat aax ab- aba abb abe abl abr abt abx aea aeb aee ael aer aet aex al- ala alb ale all alr alt alx ar- ara arb are arl arr art arx at- ata atb ate atl atr att atx ax- axa axe axl axr axt axx baa bab bae bal bar bat bax bba bbb bbe bbl bbr bbt bbx be- bea beb bee bel ber bet bex bla blb ble bll blr blt blx bra brb bre brl brr brt brx bta btb bte btl btr btt btx bxb bxl bxx eaa eab eae eal ear eat eax eba ebb ebe ebl ebr ebt ebx eea eeb eee eel eer eet eex ela elb ele ell elr elt elx era erb ere erl err ert eta etb ete etl etr ett etx ex- exa exe exl exr ext exx la- laa lab lae lal lar lat lax lba lbb lbe lbl lbr lbt lbx lea leb lee lel ler let lex lla llb lle lll llr llt lra lrb lrr lrt lta ltb lte ltl ltr ltt ltx lxr lxx ra- raa rab rae ral rar rat rax rba rbb rbe rbl rbr rbt rbx re- rea reb ree rel rer ret rex rla rle rll rlr rlt rra rrb rrl rrr rrt rta rtb rte rtl rtr rtt rtx rxr t-x taa tab tae tal tar tat tax tba tbb tbe tbl tbr tbt te- tea teb tee tel ter tet tex tla tle tll tlr tlt tlx tra trb tre trl trr trt trx tta ttb tte ttl ttr ttt ttx txe txl txt xaa xal xar xat xbe xbl xbr xbx xee xel xer xet xex xla xlb xlr xlt xrt xrx xtr xtx xxl xxx