-er -ey eee een eeo eep eer eey eie eii ein eio eip eir en- ene eni enn eno enp enr eny eo- eoe eoi eon eoo eop eor ep- epe epi epn epo epp epr ere eri ern ero erp err ery eye eyn eyo eyp eyr ie- iee iei ien iep ier iey iie iii iin iio iip iir in- ine ini inn ino inp inr iny io- ioe ioi ion ioo iop ior ipe ipi ipn ipo ipp ipr ipy ir- ire iri irn iro irp irr iry iye iyo iyr iyy n-i ne- nee nei nen neo nep ner ney nie nii nin nio nip nir nne nni nnn nno nnp no- noe noi non noo nop nor noy npe npi npn npo npp npr nre nri nrn nro nrp nrr nry nye nyn nyo nyp nyy o-i oee oei oen oeo oep oer oey oie oii oin oio oip oir on- one oni onn ono onp onr ony oo- ooi oon ooo oop oor op- ope opi opn opo opp opr opy or- ore ori orn oro orp orr ory oye oyi oyo p-p pee pei pen peo pep per pey pie pii pin pio pip pir pn- pne pni pnn pno pnp pnr pny poe poi pon poo pop por poy ppe ppi ppn ppo ppp ppr pre pri prn pro prp prr pry py- pye pyn pyo pyr re- ree rei ren reo rep rer rey rie rii rin rio rip rir riy rni rnn rno rnp rnr rny roe roi ron roo rop ror roy rpe rpi rpn rpo rpp rpr rri rrn rrp rrr ry- rye ryn ryo ryr ryy yee yei yen yeo yep yer yey yie yii yin yio yip yir yne ynn ynp yny yoe yoi yon yoo yop yor yoy ypo yre yrn yro yrp yye yyy