#include <stdlib.h>
#include <stdio.h>
#include <string.h>

int main() {
    FILE *in, *out;

    if(!(in=fopen("data.txt","r"))){
        printf("can't open data.txt\n");
        return -1;
    }
    if(!(out=fopen("result.txt","w"))){
        printf("can't open result.txt\n");
        fclose(in);
        return -1;
    }

    int m, n;
    scanf("%d %d", &n, &m);

    char s[80];
    scanf("%s", s);

    int *column = calloc(m, sizeof(int));
    int *index = calloc(m, sizeof(int));
    int *above = calloc(m, sizeof(int));

    int ans = 0;
    char curr;

    for (int i = 0; i < n; ++i) {
        //для проверки по горизонтали
        char prev = ' ';
        int len_curr = 0;

        for (int j = 0; j < m; ++j) {
            curr = fgetc(in);
            /*
            if (curr == ' ') {
                above[i] = 0;
                prev = ' ';
                continue;
            }
            */
            if (column[j]) {
                //printf("%d ", j);
                //если мы уже начали идти по столбцу
                if (index[j] == strlen(s)) {
                    ++ans;
                    column[j] = 0;
                    index[j] = 0;
                }
                if (curr == s[index[j]])
                    ++index[j];
                else {
                    column[j] = 0;
                }
            } else {
                //если не начинали идти по столбцу
                if (!above[j]) {
                    if (curr == s[0]) {
                        column[j] = index[j] = 1;
                    }
                }
            }

            if (!len_curr) {
                if (len_curr == strlen(s)) {
                    ++ans;
                    len_curr = 0;
                }
                if (curr == s[len_curr])
                    ++len_curr;
                else
                    len_curr = 0;
            }

            prev = curr;
            above[j] = curr == ' ' ? 0 : 1;
        }
    }
    printf("%d\n", ans);
    free(column);
    free(index);
    free(above);
    fclose(in);
    fclose(out);
    return 0;
}