#include <bits/stdc++.h>
#include <queue>
using namespace std;
//#pragma GCC target("avx2")
//#pragma GCC optimize("O3")
//#pragma GCC optimize("unroll-loops")
#define ll long long
#define ld long double
#define fi first
#define se second
#define pi M_PI
#define pb push_back
#define eb emplace_back
#define rep(i,N) for(int i=0;i<(ll)N;i++)
#define rrep(i,N) for(int i=N-1;i>=0;i--)
#define REP(i,s,e) for(int i=s;i<(ll)e;i++)
#define RREP(i,s,e) for(int i=e-1;i>=(ll)s;i--)
#define vecin(N,A) rep(i,N) cin>>A[i]
#define vvecin(H,W,A) rep(i,H) rep(j,W) cin>>A[i][j]
#define lb(a,x) (lower_bound(all(a),(x))-a.begin())
#define ub(a,x) (upper_bound(all(a),(x))-a.begin())
#define p_que(T) priority_queue<T>
#define sp_que(T) priority_queue<T,vector<T>,greater<T>>
#define PP pair<ll,ll>
#define PPL pair<ll,pair<ll,ll>>
#define all(x) x.begin(),x.end()
#define rsort(x) {sort(all(x));reverse(all(x));}
#define dupli(x) {sort(all(x));x.erase(unique(all(x)),x.end());}
#define popcnt __builtin_popcountll
const ll MOD = 998244353;
const ll INF = LLONG_MAX/4;
const int inf = INT32_MAX/2;
const long double EPS = 1e-10;
template<class T> bool chmin(T&a,T b){if(a>b){a=b;return true;}return false;}
template<class T> bool chmax(T&a,T b){if(a<b){a=b;return true;}return false;}
template<class T> void outp(T a){cout<<'('<<a.fi<<','<<a.se<<')'<<'\n';}
template<class T> void outvp(T v){rep(i,v.size())cout<<'('<<v[i].fi<<','<<v[i].se<<')';cout<<'\n';}
template<class T> void outvvp(T v){rep(i,v.size())outvp(v[i]);}
template<class T> void outv(T v){rep(i,v.size()){if(i)cout<<' ';cout<<v[i];}cout<<'\n';}
template<class T> void outvv(T v){rep(i,v.size())outv(v[i]);}
template<class T> void YesNo(T b){if(b)cout<<"Yes"<<'\n';else cout<<"No"<<'\n';}
ll gcd(ll a,ll b){if(b==0)return a;return gcd(b,a%b);}
ll modpow(ll a,ll b,ll z){ll res=1;a%=z;while(b){if(b&1)res=res*a%z;a=a*a%z;b>>=1;}return res;}

int main(){
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int N,M;cin>>N>>M;
    int ans = 0;
    rep(i,N){
        string S;int R;cin>>S>>R;
        bool f = false;
        rep(j,min(M,4))if(S[j]=='x')f=true;
        if(f&&R>=1200)ans++;
    }
    cout<<ans<<endl;
}