Complete the following sentence: Wexler played for Argentina in three Chess Olympiads: in 1956, at second reserve board in the 12th Chess Olympiad in Moscow (+1 <unk>3 =0); in 1960, at third board in the 14th Chess Olympiad in Leipzig (+4 <unk>5 =6); in 1964, at fourth board in the
16th Chess Olympiad in Tel Aviv (+6 <unk>2 =5).