def verified_blacklisted_tag(x, tag):
    """
    check for '<' + blacklisted_tag +  ' ' or '>'
    as in: <head> or <head ...> (should not match <header if checking for <head)
    """
    initial = x[0:len(tag) + 1 + 1]
    blacklisted_head = "<{0}".format(tag)
    return initial == (blacklisted_head + " ") or initial == (blacklisted_head + ">")