use proconio::{input, marker::Chars};

fn main() {
    input! {
        n: usize,
        _: usize,
        sr: [(Chars, usize); n],
    }

    let mut ans = 0;
    for (s, r) in sr {
        if r < 1200 {
            continue;
        }

        if s[..4].contains(&'x') {
            ans += 1;
        }
    }
    println!("{}", ans);
}