-er -ey eee eeo eep eer eex eey ehe ehh eho ehp ehr eo- eoe eoh eoo eop eor ep- epe eph epo epp epr epx ere erh ero erp err ery ex- exe exh exo exp exr exx exy eye eyo eyp eyr he- hee heh heo hep her hex hey hhe hhh hho hhp hhr hhy hoe hoh hoo hop hor hox hoy hpe hph hpo hpp hpr hpy hr- hre hrh hro hrp hrr hy- hye hyh hyo hyp hyr hyy oee oeh oeo oep oer oex oey ohe ohh oho ohp ohr oo- ooh ooo oop oor oox op- ope oph opo opp opr opx opy or- ore orh oro orp orr orx ory ox- oxo oxx oxy oye oyo p-p pee peh peo pep per pex pey phe pho php phr phx phy poe poh poo pop por pox poy ppe pph ppo ppp ppr ppx pre prh pro prp prr prx pry pxe pxr py- pye pyo pyr pyx re- ree reh reo rep rer rex rey rh- rhe rhh rho rhp rhr roe roh roo rop ror rox roy rpe rph rpo rpp rpr rpx rrh rrp rrr rxp rxr ry- rye ryo ryr ryy xee xep xer xex xhp xoo xop xor xox xpe xpo xpp xrx xry xxo xxp xxx xxy xyp xyr xyy yee yeh yeo yep yer yex yey yhe yoe yoo yop yor yox yoy ypo yre yro yrp yxe yxy yye yyy