-er -ol eee eef eel eeo eep eer eex ef- efe eff efi efl efo efp efr efx eie eif eii eil eio eip eir eix ele elf eli ell elo elp elr elx eo- eoe eof eoi eol eoo eop eor ep- epe epf epi epl epo epp epr epx ere erf eri erl ero erp err ex- exe exi exl exo exp exr exx fee fef fei fel feo fep fer fex ffe fff ffi ffl ffo ffp ffr ffx fie fif fii fil fip fir fix fle flf fli fll flo flp flr flx foe fof foi fol foo fop for fox fpe fpi fpl fpo fpp fpr fpx fre frf fri frl fro frp frr fxe fxi fxp fxr fxx i-f ie- iee ief iei iel iep ier iex ife iff ifi ifl ifo ifp ifr ifx iie iif iii iil iio iip iir iix il- ile ilf ili ill ilo ilp ilr ilx io- ioe iof ioi iol ioo iop ior ipe ipf ipi ipl ipo ipp ipr ipx ir- ire irf iri irl iro irp irr irx ixe ixi ixl l-p lee lef lei lel leo lep ler lex lfe lff lfi lfl lfo lfp lfr lfx lie lif lii lil lio lip lir lix lle llf lli lll llo llp llr loe lof loi lol loo lop lor lox lpe lpf lpi lpl lpo lpp lpr lpx lrf lri lro lrp lrr lxi lxo lxr lxx o-i oee oef oei oel oeo oep oer oex of- ofe off ofi ofl ofo ofp ofr ofx oie oif oii oil oio oip oir ole olf oli oll olo olp oo- oof ooi ool ooo oop oor oox op- ope opf opi opl opo opp opr opx or- ore orf ori orl oro orp orr orx ox- oxf oxi oxo oxx p-p pee pef pei pel peo pep per pex pfe pff pfi pfl pfo pfp pfr pfx pie pif pii pil pio pip pir pix ple plf pli pll plo plp plr plx poe pof poi pol poo pop por pox ppe ppf ppi ppl ppo ppp ppr ppx pre prf pri prl pro prp prr prx pxe pxl pxr re- ree ref rei rel reo rep rer rex rfe rff rfi rfl rfo rfp rfr rie rif rii ril rio rip rir rix rle rlf rli rll rlo rlp rlr roe rof roi rol roo rop ror rox rpe rpf rpi rpl rpo rpp rpr rpx rrf rri rrl rrp rrr rxp rxr xee xel xep xer xex xfe xfl xfx xie xii xio xix xlf xli xlr xof xoi xoo xop xor xox xpe xpf xpl xpo xpp xrf xrx xxi xxl xxo xxp xxx