def su(n):
for i in range(2,n):
if n%i==0:
return False
return True
def fan(n):
s=0
while n!=0:
s=s*10+n%10
n=n//10
return s
m=int(input('请输入m:'))
n=int(input('请输入n:'))
for i in range(m,n+1):
if su(i) and su(fan(i)):
print(i,end=' ')