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  1. or download this
    if (($a == 3) || ($a ==  77) || ($a == 8))
-- is equivalent to --
if (($a != 3) && ($a !=  77) && ($a != 8))
  2. or download this
    if (($a == 3) || ($a ==  77) || ($a == 8))
-- is equivalent to --
if (!( ($a != 3) && ($a !=  77) && ($a != 8) ))