#include <bits/stdc++.h> 
using namespace std;
int main(){
	int z=999,i=100,a,b,c;
	while(i<=z){
		a=i/100;
		b=i/10%10;
		c=i%10;
		if(a==c){
			cout<<i<<endl;
		}
		i++;
		}
}
/**************************************************************
	Problem: 1701
	User: sucongyi
	Language: C++
	Result: Accepted
	Time:13 ms
	Memory:2072 kb
****************************************************************/