import std;

void main () {
    int N, M; readln.read(N, M);
    int ans = 0;
    foreach (i; 0 .. N) {
        string S;
        int R;
        readln.read(S, R);

        bool cond = false;
        foreach (j; 0 .. min(4L, S.length)) {
            if (S[j] == 'x') cond = true;
        }

        if (cond && 1200 <= R) {
            ans++;
        }
    }

    writeln(ans);
}

void read (T...) (string S, ref T args) {
    import std.conv : to;
    import std.array : split;
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}