function Main(INPUT){
  const input=INPUT.split("\n");
  const [N,M]=input[0].split(" ").map(_=>parseInt(_));
  let ans = 0;
  for(let i=0;i<N;i++){
    const [S,r]=input[1+i].split(" ");
    const R=parseInt(r);
    if(R>=1200 && S.slice(0,4).includes('x')){
      ans++;
    }
  }
  console.log(ans);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));