def METHOD_NAME(num_atoms, forces_filenames, verbose=True):
    """Parse forces from output files."""
    hook = "Forces :"
    is_parsed = True
    force_sets = []
    for i, filename in enumerate(forces_filenames):
        if verbose:
            sys.stdout.write("%d. " % (i + 1))
        f = open(filename)
        elk_forces = collect_forces(f, num_atoms, hook, [3, 4, 5], word="total force")
        if check_forces(elk_forces, num_atoms, filename, verbose=verbose):
            drift_force = get_drift_forces(
                elk_forces, filename=filename, verbose=verbose
            )
            force_sets.append(np.array(elk_forces) - drift_force)
        else:
            is_parsed = False
    if is_parsed:
        return force_sets
    else:
        return []