developers = set(['tuan', 'chau', 'hung', 'hoang', 'hoan'])* find manager who coding
managers = set(['hoang', 'ngoc'])
managers & developers* find manager who not coding
managers - developers* find all
managers | developershappy coding
developers = set(['tuan', 'chau', 'hung', 'hoang', 'hoan'])* find manager who coding
managers = set(['hoang', 'ngoc'])
managers & developers* find manager who not coding
managers - developers* find all
managers | developershappy coding