quantum-espresso/atomic/examples/all-electron/c_oep.in

 &input
        title='C',
        zed=6.0,
        xmin=-6, rmax=40.0,
        rel=0,
        lsd=1,
        isic=0,
        iswitch=1,
        config='[He] 2s2 2p2',
        dft='OEP',
 /