#include<stdio.h>
int main()
{
    int i;
    int n;
    scanf("%d",&n);
    for(i=1000;i<=n;i++)
    {
        if(i%2==1)
        {
            if(i/1000==i/10%10&&i/100%10==i%10)
            printf("%d\n",i);
        }
    }
    return 0;
}


/**************************************************************
	Problem: 1737
	User: admin
	Language: C
	Result: Accepted
	Time:12 ms
	Memory:1144 kb
****************************************************************/