-er -ey eee eeo eep eer eet eev eex eey eo- eoe eoo eop eor eot ep- epe epo epp epr ept epx ere ero erp err ert erv ery ete eto etp etr ett etv etx ety eve evo evp evr evt evv evy ex- exe exo exp exr ext exx exy eye eyo eyp eyr eyt oee oeo oep oer oet oex oey oo- ooo oop oor oot oov oox op- ope opo opp opr opt opv opx opy or- ore oro orp orr ort orv orx ory ot- ote oto otp otr ott otv ov- ove ovo ovp ovv ox- oxo oxt oxx oxy oye oyo p-p pee peo pep per pet pev pex pey poe poo pop por pot pov pox poy ppe ppo ppp ppr ppt ppv ppx pre pro prp prr prt prv prx pry pt- pte pto ptp ptr ptt ptv ptx pty pve pvo pvp pvr pvt pvv pxe pxr pxt py- pye pyo pyr pyt pyx re- ree reo rep rer ret rev rex rey roe roo rop ror rot rov rox roy rpe rpo rpp rpr rpt rpv rpx rrp rrr rrt rte rto rtp rtr rtt rtv rtx rty rve rvo rvp rvr rvt rvv rvy rxp rxr ry- rye ryo ryr ryy t-x te- tee teo tep ter tet tev tex tey to- toe too top tor tot tov tox toy tpe tpo tpp tpr tpt tpv tpx tre tro trp trr trt trv trx try tte tto ttp ttr ttt ttv ttx tty tve tvo tvp tvr tvt tvx tvy txe txt tye tyo typ tyr tyt v-e vee veo vep ver vet vex vey voe voo vop vor vot vov vox voy vpe vpo vpp vpr vpt vpx vre vrp vrr vrt vry vte vto vtr vtt vtv vtx vty vvo vvr vvt vvv vxr vxv vye vyp vyt xee xep xer xet xev xex xoo xop xor xot xov xox xpe xpo xpp xpt xrt xrx xry xtp xtr xtv xtx xty xvt xxo xxp xxv xxx xxy xyp xyr xyy yee yeo yep yer yet yev yex yey yoe yoo yop yor yot yox yoy ypo yre yro yrp yrt yte yto ytp ytr ytt ytv yve yvo yvr yvy yxe yxy yye yyt yyy