#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#ifdef local
#include <C++/core/io/debug_print.hpp>
#else
#define dump(...) void(0);
#endif

#include <iostream>
#include <ranges>
#include <cassert>
#include <algorithm>
namespace man {

}
int main() {
    std::cin.tie(nullptr) -> sync_with_stdio(false);
    using namespace std::views;
    int n, m;
    std::cin >> n >> m;
    int shocked = 0;
    for([[maybe_unused]] const auto _: iota(0, n)) {
    	std::string s;
    	int r;
    	std::cin >> s >> r;
    	assert(std::ssize(s) == m);
    	s.resize(4);
    	if(std::ranges::any_of(s, [](const char c) -> bool { return c == 'x'; }) && r >= 1200) {
    		shocked++;
    	}
    }
    std::cout << shocked << '\n';
}