#include <fstream>

using namespace std;

ifstream in("palindrom2.in");
ofstream out("palindrom2.out");

int main()
{
    int x, n, p, v[10], z, k ,l, i,j;
    in>>p>>n;
    for(i=1; i<=n; i++)
    {
        z=0;
        l=0;
        in>>x;
        i=1;
        while(x)
        {
            v[i]=x%10;
            x=x/10;
            i++;
        }
        j=i;
        i=1;
        for(k=1; k<=j/2; k++)
        {
            if(v[k]==v[j-k+1]) z++;
            else l++;
        }

    }
    if(p==1) out<<z;
    else if(p==2) out<<l;
    else {

    }
    return 0;
}