manager = {'张老师', '王老师', '程老师'}
professor = {'张老师', '王老师', '刘老师', '马老师'}
print("既是学校领导也是教授:", manager & professor)

print("是教授但不是学院领导：", professor - manager)

print("是学院领导但不是教授：", manager - professor)

if "刘老师" in manager:
    print("刘老师是学院领导")
else:
    print("刘老师不是学院领导")

print("只担任一职的是：", manager ^ professor)

print("学院领导和教授共有：", len(manager|professor),"人")