#include <iostream>


int main() {
    std::string s = "";
    char c, l;
    int n, k = 0;
    std::cin >> n;
    while (n != 0) {
        std::cin >> l;
        s += l;
        if (l != ' ') {
            --n;
        }
    }

    std::cin >> c;
    for (int i = 0; i < s.size(); ++i) {
        if (s[i] == c) {
            ++k;
        }
    }
    std::cout << k;

}