#include <iostream>
#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdint>
#include <set>
#include <unordered_set>
#include <map>
#include <vector>
#include <string>
#include <deque>
#include <queue>
#include <iomanip>
#include <ranges>
#include <concepts>
#include <numeric>
#ifdef ATCODER
#include <atcoder/modint>
#include <atcoder/segtree>
#include <atcoder/dsu>
#endif

using namespace std;
using ll = long long;
using pall = pair<ll,ll>;
template<class T> using vec = vector<T>;
template<class T> using veve = vec<vec<T>>;
using vell = vec<ll>;
using vebo = basic_string<bool>;
using vevell = veve<ll>;
template<class T> using uset = unordered_set<T>;
template<class T> using mset = multiset<T>;
template<class T> using priority_queue_ascend = priority_queue<T, vec<T>, greater<T>>;
static const ll inf = numeric_limits<ll>::max();
static const string sp = string(" ");
static const string lf = string("\n");
static const auto &npos = string::npos;
static const vec<pall> grid_move4 = {
	{0, 1},
	{-1, 0},
	{0, -1},
	{1, 0}
};
static const vec<pall> grid_move8 = [] {
	auto ret = grid_move4;
	ret.insert(ret.end(), {
		{-1, 1},
		{-1, -1},
		{1, -1},
		{1, 1}
	});
	return ret;
}();
static constexpr ll MOD = 998244353 /* 1000000007 */;
#define cont continue
#define br break
static auto &ciN = cin;
static auto &icn = cin;
static auto &icN = cin;
static constexpr bool ture = true;
using itn = int;

#ifdef ATCODER
using namespace atcoder;
using mint = static_modint<MOD>;
#endif

#if 202000L <= __cplusplus
#define times(N) static_assert(is_integral_v<decltype((N) + 0)>, "times(): N must be integral"); for([[maybe_unused]] const auto &_N = (N); [[maybe_unused]] const decltype(_N + 0) _c: views::iota(decltype(_N + 0)(0), _N))
#else
#define times(N) static_assert(is_integral_v<decltype((N) + 0)>, "times(): N must be integral"); for(bool _ = true;_;) for([[maybe_unused]] const auto &_N = (N);_;_ = false) for(decltype(_N + 0) _c = 0;_c != _N;_c += 1)
#endif

#ifdef ATCODER
template<int M>
istream &operator>>(istream &in, static_modint<M> &i) {
	ll tmp;
	in >> tmp;
	i = tmp;
	return in;
}
template<int M>
ostream &operator<<(ostream &out, const static_modint<M> &i) {
	return out << i.val();
}
#endif

template<class T, class U>
istream &operator>>(istream &in, pair<T, U> &p) {
	return in >> p.first >> p.second;
}
template<class T, class U>
ostream &operator<<(ostream &out, const pair<T, U> &p) {
	return out << p.first << sp << p.second;
}

template<class T>
istream &operator>>(istream &in, vec<T> &v) {
	for(auto &e:v) {
		in >> e;
	}
	return in;
}

namespace myinput {
	template<class T>
	set<size_t> check_align_(const vec<T> &v) {
		set<size_t> s;
		s.insert(v.size());
		return s;
	}
	template<class T, class... Args>
	set<size_t> check_align_(const vec<T> &v, Args&... args) {
		set<size_t> &&s = check_align_(args...);
		s.insert(v.size());
		return s;
	}
	template<class... Args>
	bool check_align(Args&... args) {
		return check_align_(args...).size() == size_t(1);
	}

	template<class T>
	void in_(const size_t i, const bool isRoot, vec<T> &v) noexcept {
		if(i >= v.size()) return;
		cin >> v[i];
		if(isRoot && i + 1 < v.size()) {
			in_(i + 1, true, v);
		}
	}
	template<class T, class... Args>
	void in_(const size_t i, const bool isRoot, vec<T> &v, Args&... args) noexcept {
		if(i >= v.size()) return;
		cin >> v[i];
		in_(i, false, args...);
		if(isRoot && i + 1 < v.size()) {
			in_(i + 1, true, v, args...);
		}
	}
	template<class... Args>
	istream &in(Args&... args) {
		assert(sizeof...(args) != 0);
		if(!check_align(args...)) throw invalid_argument("myfunc::in(): Why are the vector sizes not aligned!?!?");
		in_(size_t(0), true, args...);
		return cin;
	}
}
using myinput::in;

#if defined(__cpp_lib_ranges) && 201911L <= __cpp_lib_ranges
void out(const ranges::range auto &v, const string &delim, ostream &out = cout) noexcept {
	for(auto &&e:v) {
		out << e << delim;
	}
}
#endif

[[nodiscard]] constexpr const string &yesno(const bool cond, const string &yes="Yes", const string &no="No") noexcept {
	if(cond) return yes;
	return no;
}

/*
#include <random>
random_device seed;
mt19937_64 mt(seed());
// [mi, ma)
[[nodiscard]] uint64_t randint(const uint64_t mi, const uint64_t ma) noexcept {
	if(mi > ma) return randint(ma, mi);
	if(mi == ma) return mi;
	const uint64_t w = ma - mi;
	uint64_t r = mt();
	while(mt.max() - mt.max() % w < r) r = mt();
	return r % w + mi;
}
*/

#if defined(__cpp_concepts) && defined(__cpp_lib_concepts)
template<class T, class U>
requires common_with<T, U>
[[nodiscard]] constexpr const common_type_t<T, U> min(const T &a, const U &b) noexcept {
	return std::min<common_type_t<T, U>>(a, b);
}
template<class T, class U>
requires common_with<T, U>
[[nodiscard]] constexpr const common_type_t<T, U> max(const T &a, const U &b) noexcept {
	return std::max<common_type_t<T, U>>(a, b);
}
#endif

#if defined(__cpp_lib_ranges) && 201911L <= __cpp_lib_ranges
template<class T>
[[nodiscard]] constexpr T &min(const vec<T> &v) {
	return *ranges::min_element(v);
}
template<class T>
[[nodiscard]] constexpr T &max(const vec<T> &v) {
	return *ranges::max_element(v);
}
#endif

[[nodiscard]] constexpr ll powll(ll a, ll b, const ll m = inf) {
	if(b < 0) [[unlikely]] throw invalid_argument("powll(): exponent less than zero");
	if(m < 2) [[unlikely]] throw invalid_argument("powll(): modulo less than two");
	a %= m;
	ll ret = 1;
	while(b) {
		if(b % 2) ret *= a, ret %= m;
		a *= a, a %= m;
		b /= 2;
	}
	return ret;
}

#ifdef __cpp_concepts
template<class T, class U>
requires assignable_from<T&, U> && totally_ordered_with<T, U>
constexpr bool mini(T &var, const U &val) noexcept {
	const bool cmp = var > val;
	if(cmp) var = val;
	return cmp;
}
template<class T, class U>
requires assignable_from<T&, U> && totally_ordered_with<T, U>
constexpr bool maxi(T &var, const U &val) noexcept {
	const bool cmp = var < val;
	if(cmp) var = val;
	return cmp;
}
#endif

class grid {
	public:
	#ifdef __cpp_lib_constexpr_string
	constexpr
	#endif
	grid(const ll h, const ll w) : height(h), width(w) {
		visited = vebo(h * w, false);
	}

	[[nodiscard]] constexpr ll operator()(const ll i, const ll j) const noexcept {
		if(!isvalid(i, j)) return -1;
		return i * width + j;
	}

	[[nodiscard]] constexpr ll operator()(const pair<ll, ll> &p) const noexcept {
		return (*this)(p.first, p.second);
	}

	[[nodiscard]] constexpr bool &seen(const ll i, const ll j) & {
		if(!isvalid(i, j)) throw out_of_range("grid::seen(): out of range");
		return (*this).visited[i * width + j];
	}

	[[nodiscard]] constexpr bool &seen(const pair<ll, ll> &p) & {
		return this->seen(p.first, p.second);
	}

	private:
	constexpr bool isvalid(const ll i, const ll j) const noexcept {
		return 0 <= i && 0 <= j && i < height && j < width;
	}
	const ll height, width;
	vebo visited;
};

template<class T>
constexpr auto erase_single(multiset<T> &mset, const T &v) {
	const auto it = mset.find(v);
	if(it == mset.end()) throw invalid_argument("erase_single(): why v not in mset!?!?");
	return mset.erase(it);
}

void solve();

int main(void) {
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	solve();
	return 0;
}

void solve() {
	ll n, m;
	cin >> n >> m;
	ll ans = 0;
	times(n) {
		string s;
		ll r;
		cin >> s >> r;
		bool match = ture;
		match = match && r >= 1200;
		match = match && (s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x');
		ans += int(match);
	}
	cout << ans;
}