#include<iostream>
using namespace std;
int main()
{
	int a,b,x,y,r;
	cout<<"a="; cin>>a;
	cout<<"b="; cin>>b;
	for(x=a;x<=b;x++)
	{
		r=0;
		y=x;
		while(y>0)
		{
			r=r*10+y%10;
			y=y/10;
		}
		if(r==x) 
			{ cout<<x;
		      x=b+1;
			} 
	}
	return 0;
}