-er -ey eee eeo eep eer eet eex eey eo- eoe eoo eop eor eot ep- epe epo epp epr ept epx ere ero erp err ert ery ete eto etp etr ett etx ety 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 oox op- ope opo opp opr opt opx opy or- ore oro orp orr ort orx ory ot- ote oto otp otr ott ox- oxo oxt oxx oxy oye oyo p-p pee peo pep per pet pex pey poe poo pop por pot pox poy ppe ppo ppp ppr ppt ppx pre pro prp prr prt prx pry pt- pte pto ptp ptr ptt ptx pty pxe pxr pxt py- pye pyo pyr pyt pyx re- ree reo rep rer ret rex rey roe roo rop ror rot rox roy rpe rpo rpp rpr rpt rpx rrp rrr rrt rte rto rtp rtr rtt rtx rty rxp rxr ry- rye ryo ryr ryy t-x te- tee teo tep ter tet tex tey to- toe too top tor tot tox toy tpe tpo tpp tpr tpt tpx tre tro trp trr trt trx try tte tto ttp ttr ttt ttx tty txe txt tye tyo typ tyr tyt xee xep xer xet xex xoo xop xor xot xox xpe xpo xpp xpt xrt xrx xry xtp xtr xtx xty xxo xxp xxx xxy xyp xyr xyy yee yeo yep yer yet yex yey yoe yoo yop yor yot yox yoy ypo yre yro yrp yrt yte yto ytp ytr ytt yxe yxy yye yyt yyy