#include <bits/stdc++.h>

int main()
{
    int n, m;
    std::cin >> n >> m;
    std::vector<int> r(n);
    std::vector<std::string> s(n);
    for (int i = 0; i < n; ++i) {
        std::cin >> s[i] >> r[i];
    }
    int ans = 0;
    for (int i = 0; i < n; ++i) {
        if (r[i] < 1200) continue;
        for (int j = 0; j < 4; ++j) {
            if (s[i][j] == 'x') {
                ans++;
                break;
            }
        }
    }
    std::cout << ans << std::endl;
}