def List(a,b):
res = []
for i in range(a,b+1):
if i%2==0:
res.append(i)
return res
a = int(input())
b = int(input())
print(List(a,b))
def List(a=int(eval(input("a="))),b=int(eval(input("b=")))):#直接运行即可输入,有提示语句a=,b=
list1=[]
if a%2==0:
for i in range(a,b+1,2):
#如果a为偶数,则以2步往上加,b+1的话,b为偶,则有b,b为奇,range也走不到b+1(这是range取头不取尾的妙用)
list1.append(i)
else:
for i in range(a,b,2):
#和上面同理
list1.append(i+1)
return list1
print(List())