#include<stdio.h>
#include<math.h>

int main()
{
	int t,palindrome=0,i,a,b,y,n,g;
	scanf("%d %d",&a,&b);
	for(i=a;i<=b;i++)
	{
		palindrome = 0;
		y = 2; 
		n = i % y;
		while (n != 0)
		{
			y++;
			n = i % y;

		}
		if (i == y)
		{
			n = i;
			for (; n != 0; n /= 10)
			{
				t = n % 10;
				palindrome = palindrome * 10 + t;
			}
			if (palindrome == i)
			{
				printf("%d", i);
				printf("\n");
			}
		}
		
	}
	return 0;
}