#include <iostream>
#include <string>

int main() {
    int N, M;
    std::cin >> N >> M;
    int count = 0;
    while (N--) {
        std::string S;
        int R;
        std::cin >> S >> R;
        S = S.substr(0, 4);
        count += R >= 1200 && S.find('x') < 4;
    }
    std::cout << count << std::endl;
}