use proconio::{input, marker::Chars};
fn main() {
    input!{
        n: usize,
        m: usize,
        rs: [(Chars,usize);n]
    }
    let mut ans = 0;
    for (r,s) in rs{
        if (0..4).any(|i| r[i] == 'x') && s>=1200{
            ans += 1
        }
    }
    println!("{}",ans)
}