#include <stdio.h>

int Symmetry(long long n)
{
	long long sym = n*n;
	int a[20],i = 0;
	while(sym)
	{
		a[i++] = sym%10;
		sym/=10;
	}
	int j = 0;
	i--;
	while(j < i)
	{
		if(a[i] != a[j])
			return 0;
		i--;
		j++;
	}
	return 1;
}

int main()
{
	long long i;
	for(i = 0; i <= 256; i++)
	{
		if(i <= 3) printf("%lld\n",i);
		else if(Symmetry(i))
			printf("%lld\n",i);
	}
	return 0;
}