#include <bits/stdc++.h>
using namespace std;
ifstream f("matrix.in");
ofstream g("matrix.out");

int n, m, a[1001][1001], fr[26], dp[1001][1001], sum[1001][1001], v[1001][1001];
string s;

int main()
{
    f >> n >> m;
    for (int i=1; i<=n; ++i) {
        f >> s;
        for (int j=0; j<s.size(); ++j)
            a[i][j+1] = s[j] - 'a';
    }
    for (int i=1; i<=m; ++i) {
        f >> s;
        for (int j=0; j<s.size(); ++j)
            fr[ s[j]-'a' ]++;
    }

    for (int c=0; c<26; ++c) {
        for (int i=1; i<=n; ++i)
            for (int j=1; j<=n; ++j)
                if (a[i][j] == c)
                    sum[i][j] = 1;
                else sum[i][j] = 0;
        for (int i=1; i<=n; ++i)
            for (int j=1; j<=n; ++j)
                sum[i][j] += (sum[i-1][j] + sum[i][j-1] - sum[i-1][j-1]);
        for (int i=m; i<=n; ++i)
            for (int j=m; j<=n; ++j) {
                dp[i][j] = sum[i][j] - sum[i-m][j] - sum[i][j-m] + sum[i-m][j-m];
                if (dp[i][j] == fr[c])
                    v[i][j] ++;
            }

    }
    int ans = 0;
    for (int i=m; i<=n; ++i)
        for (int j=m; j<=n; ++j) {
            if (v[i][j] == 26)
                ans++;
        }
    g << ans;
    return 0;
}