animal1 = "cats"
animal2 = "dogs"

if animal1 == animal2:
    print("这两种动物一样")
else:
    print("这是两种不同的动物")


if "cataa" in animal1:
    print("猫咪属于动物")

if "cataa" not in animal1:
    print("猫咪不属于动物")