-ene eeee eefe eefn efen eheh ehen eher ehre enee ener enfp enne enp- epee epen eper eph- eppp eprp eren erer erne erpe erre feen feer fefe feff fehr fene fenn fere fern ferr ffee ffff ffrr fprf free fren frep heef heep heer hefe hehe hehn hene henh henn hepe hepp here hern herp herr hhhh hppe hree hrpp neef neen neep neer nefe neff nefh nehe nene nenh nepe neph nepr nere nerf nerr nfer nfff nhnn nhrp nnnn nnpr nren nrpn peen peep peer peff pehe pehr pen- pene penh penn pepe per- pere perf perh pern perp perr pfff pffr phe- phen phrr pnpp ppen pper pppn pppp pprf pre- pree pref pren prep prnp reef reen reep refe reff refn refr rehe rehn rene renn repe repp repr rere rfef rhee rhen rppn rrrr