#include <iostream>
#include <cstdint>
#include <vector>

using namespace std;

int main()
{
	cin.tie(nullptr);
	ios::sync_with_stdio(false);

	uint32_t N, M, i, j;
	cin >> N >> M;
	vector<string> S(N);
	vector<uint16_t> R(N);
	for (i = 0; i != N; ++i)
		S[i].reserve(M), cin >> S[i] >> R[i];

	uint32_t ans = 0;
	for (i = 0; i != N; ++i)
		if (R[i] >= 1200)
		{
			for (j = 0; j != 4; ++j)
				if (S[i][j] == 'x') break;

			if (j != 4) ++ans;
		}

	cout << ans << '\n';
	return 0;
}