def getAtomNames(values):
    """
        Assign to each value an atomname, O for negatives, H for 0 and N for
        positives. This function is created for assign atomnames for custom pdbs

        :param values: Collection of numbers to assing an atom name for
        :type values: iterable

        :returns: list -- List of atom names
    """
    names = ["O", "H", "N"]
    values += 1
    return [names[int(value)] for value in values]