#[allow(unused)]
use proconio::{input, marker::Chars};

fn main() {
    input! {
        n: usize,
        _: usize,
    }
    let mut cnt = 0;
    for _ in 0..n {
        input! {
            s: String,
            r: i32,
        }
        let t = s[0..4].chars().filter(|&c| c == 'x').collect::<String>();
        if t.len() > 0 && r >= 1200 {
            cnt += 1;
        }
    }
    println!("{cnt}")
}