List up site symmetries

    The data structure is as follows:

        wyckoff[0]['wyckoff'][0]['site_symmetry']

    Note
    ----
    Maximum length of string is 6.

def get_site_symmetries(wyckoff):
    """List up site symmetries

    The data structure is as follows:

        wyckoff[0]['wyckoff'][0]['site_symmetry']

    Note
    ----
    Maximum length of string is 6.

    """

    ssyms = []
    for w in wyckoff:
        ssyms += ["\"%-6s\"" % w_s['site_symmetry'] for w_s in w['wyckoff']]

    damp_array_site_symmetries(ssyms)