-er -up eee eem eep eer ees eet eex em- eme emm emp emr ems emt emu emx ep- epe epm epp epr eps ept epu epx ere erm erp err ers ert eru es- ese esm esp esr ess est esu esx ete etm etp etr ets ett etu etx eu- eue eup eur eus eut eux ex- exe exp exr exs ext exu exx m-r mee mem mep mer mes met meu mex mme mmm mmp mmr mms mmt mmu mmx mpe mpm mpp mpr mps mpt mpu mpx mre mrm mrp mrr mrs mrt mru mrx mse msm msp msr mss mst msu msx mte mtm mtp mtr mts mtt mtu mtx mue mum mup mur mus mut muu mux mxp mxr mxs mxu p-p pee pem pep per pes pet peu pex pme pmm pmp pmr pms pmt pmu pmx ppe ppm ppp ppr pps ppt ppu ppx pre prm prp prr prs prt pru prx ps- pse psm psp psr pss pst psu psx pt- pte ptm ptp ptr pts ptt ptu ptx pue pum pup pur pus put puu pxe pxm pxr pxs pxt re- ree rem rep rer res ret reu rex rme rmm rmp rmr rms rmt rmx rpe rpm rpp rpr rps rpt rpu rpx rrm rrp rrr rrs rrt rru rse rsm rsp rsr rss rst rsu rsx rte rtm rtp rtr rts rtt rtu rtx rue rum rup rur rus rut ruu rux rxp rxr rxs se- see sem sep ser ses set seu sex sme smm smp smr sms smt smu smx spe spm spp spr sps spt spu spx sr- sre srm srp srr srs srt srx ss- sse ssm ssp ssr sss sst ssu ssx ste stm stp str sts stt stu stx sue sum sup sur sus sut suu sux sxm sxs sxt sxu t-x te- tee tem tep ter tes tet teu tex tme tmm tmp tmr tms tmt tmu tmx tpe tpm tpp tpr tps tpt tpu tpx tre trm trp trr trs trt tru trx tse tsm tsp tsr tss tst tsu tsx tte ttm ttp ttr tts ttt ttu ttx tue tum tup tur tus tut tuu tux txe txs txt txu uee uem uep uer ues uet um- ume umm ump umr ums umt umu up- upe upm upp upr ups upt upu upx ur- ure urm urp urr urs urt uru urx use usm usp usr uss ust usu usx ute utm utp utr uts utt utu utx uue uum uur uus uut uuu uxr uxt uxu xee xem xep xer xes xet xeu xex xmm xmp xmr xms xmt xmu xmx xpe xpm xpp xps xpt xrt xrx xsm xsp xss xst xtm xtp xtr xts xtx xue xup xus xxp xxx