J and Z -1J and Z -2J and Z -3J and Z -4J and Z -5J and Z -6J and Z -7J and Z -8J and Z -9J and Z -10J and Z -11J and Z -12J and Z -13J and Z -14J and Z -15J and Z -16J and Z -17J and Z -18J and Z -19J and Z -20