-er eee eel eem eep eer eet eex eie eii eil eim eip eir eit eix ele eli ell elm elp elr elt elx em- eme emi eml emm emp emr emt emx ep- epe epi epl epm epp epr ept epx ere eri erl erm erp err ert ete eti etl etm etp etr ett etx ex- exe exi exl exp exr ext exx ie- iee iei iel iem iep ier iet iex iie iii iil iim iip iir iit iix il- ile ili ill ilm ilp ilr ilt ilx im- ime imi iml imm imp imt imx ipe ipi ipl ipm ipp ipr ipt ipx ir- ire iri irl irm irp irr irt irx ite iti itl itm itp itt itx ixe ixi ixl l-p lee lei lel lem lep ler let lex lie lii lil lim lip lir lit lix lle lli lll llm llp llr llt lme lmi lml lmm lmp lmr lmt lpe lpi lpl lpm lpp lpr lpt lpx lri lrm lrp lrr lrt lte lti ltl ltm ltp ltr ltt ltx lxi lxr lxx m-r mee mei mel mem mep mer met mex mi- mie mii mil mim mip mir mit mix mle mli mll mlm mlp mlr mlt mlx mme mmi mml mmm mmp mmr mmt mmx mpe mpi mpl mpm mpp mpr mpt mpx mre mri mrl mrm mrp mrr mrt mrx mte mti mtl mtm mtp mtr mtt mtx mxi mxl mxp mxr p-p pee pei pel pem pep per pet pex pie pii pil pim pip pir pit pix ple pli pll plm plp plr plt plx pme pmi pml pmm pmp pmr pmt pmx ppe ppi ppl ppm ppp ppr ppt ppx pre pri prl prm prp prr prt prx pt- pte pti ptl ptm ptp ptr ptt ptx pxe pxl pxm pxr pxt re- ree rei rel rem rep rer ret rex rie rii ril rim rip rir rit rix rle rli rll rlm rlp rlr rlt rme rmi rml rmm rmp rmr rmt rmx rpe rpi rpl rpm rpp rpr rpt rpx rri rrl rrm rrp rrr rrt rte rti rtl rtm rtp rtr rtt rtx rxp rxr t-x te- tee tei tel tem tep ter tet tex tie tii til tim tip tir tit tix tle tli tll tlm tlp tlr tlt tlx tme tmi tml tmm tmp tmr tmt tmx tpe tpi tpl tpm tpp tpr tpt tpx tre tri trl trm trp trr trt trx tte tti ttl ttm ttp ttr ttt ttx txe txi txl txt xee xel xem xep xer xet xex xie xii xit xix xli xlm xlr xlt xmi xml xmm xmp xmr xmt xmx xpe xpl xpm xpp xpt xrt xrx xti xtm xtp xtr xtx xxi xxl xxp xxx