age = 111
if age < 2:
    print('你应该是个婴儿!')
if age < 4 and age >= 2:
    print('你应该是正在学走路!')
if age < 13 and age >= 4:
    print('你应该是个儿童!')
if age < 20 and age >= 13:
    print('你应该是个少年')
if age < 65 and age >= 20:
    print('你应该是个成年人!')
if age >= 65 and age < 80:
    print('你是个老年人了!')
if age >= 80 and age > 110:
    print('恭喜你!你的朋友应该都不在了!')