#include<bits/stdc++.h>
 using namespace std; 
 int main()
 { int a,b,i;

cin>>a>>b;
for(i=a;i<=b;i++)
{
	string c;
	c=i;
	reverse(c.begin(),c.end());
	if(c==c)
	{
		cout<<c;
	}
}