If the last name or a reasonably close spelling of the last name of a person engaged in or pursuing a write-in campaign pursuant to section 32-615 or 32-633 is written or printed on a line provided for that purpose and the square or oval opposite such line has been marked with a cross or other clear, intelligible mark, the vote shall be valid and the ballot shall be counted. A write-in vote for a person who is not engaged in or pursuing a write-in campaign pursuant to section 32-615 or 32-633 shall not be counted.