-er eee eef eeo eer ef- efe eff efh efo efr ehe ehf ehh eho ehr eo- eoe eof eoh eoo eor ere erf erh ero err fee fef feh feo fer ffe fff ffh ffo ffr fhe fhf fhh fho fhr foe fof foh foo for fre frf frh fro frr he- hee hef heh heo her hfe hff hfh hfo hfr hhe hhf hhh hho hhr hoe hof hoh hoo hor hr- hre hrf hrh hro hrr oee oef oeh oeo oer of- ofe off ofo ofr ohe ohf ohh oho ohr oo- oof ooh ooo oor or- ore orf orh oro orr re- ree ref reh reo rer rfe rff rfh rfo rfr rh- rhe rhf rhh rho rhr roe rof roh roo ror rrf rrh rrr