#include<iostream>
using namespace std;
int main()
{
int count=0;
for(int i=1000; i<=9999; i++)
{
int n[4],tem=i,p=0;
while(tem)
{
n[p++]=tem%10;
tem/=10;
}
if(n[0]==n[3]&&n[1]==n[2])
{
cout << i << " ";
count++;
if(count%6==0)
cout << "" << endl;
}
}
cout << count << endl;
return 0;
}