-er eee eel eep eer eet eex ele ell elp elr elt elx ep- epe epl epp epr ept epx ere erl erp err ert ete etl etp etr ett etx ex- exe exl exp exr ext exx l-p lee lel lep ler let lex lle lll llp llr llt lpe lpl lpp lpr lpt lpx lrp lrr lrt lte ltl ltp ltr ltt ltx lxr lxx p-p pee pel pep per pet pex ple pll plp plr plt plx ppe ppl ppp ppr ppt ppx pre prl prp prr prt prx pt- pte ptl ptp ptr ptt ptx pxe pxl pxr pxt re- ree rel rep rer ret rex rle rll rlp rlr rlt rpe rpl rpp rpr rpt rpx rrl rrp rrr rrt rte rtl rtp rtr rtt rtx rxp rxr t-x te- tee tel tep ter tet tex tle tll tlp tlr tlt tlx tpe tpl tpp tpr tpt tpx tre trl trp trr trt trx tte ttl ttp ttr ttt ttx txe txl txt xee xel xep xer xet xex xlr xlt xpe xpl xpp xpt xrt xrx xtp xtr xtx xxl xxp xxx