&control
    calculation='relax',
    restart_mode='from_scratch',
    prefix='h2o'
    pseudo_dir = '~/pseudos/',
    outdir='./'
    tprnfor = .true.
 /
 &system
    ibrav = 1, celldm(1) =20.0, nat=  3, ntyp= 2,
    ecutwfc = 30.0, ecutrho = 300.0
 /
 &electrons
    mixing_beta = 0.7
    conv_thr =  1.0d-8
 /
 &ions
    ion_dynamics="bfgs",
 /
ATOMIC_SPECIES
 H  1.010 HUSPBE.RRKJ3
 O  16.01 O.PBE.US.RRKJ3 
ATOMIC_POSITIONS (angstrom)
 O     0.000000     0.000000     0.000000
 H     0.000000     0.300000     0.950000
 H     0.000000     0.300000    -0.950000
K_POINTS (automatic)
1 1 1 0 0 0