import java.util.Scanner;

public class No3010 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		String[] splitedLine = sc.nextLine().split(" ");
		int humanNum = Integer.parseInt(splitedLine[0]);
		int questionNum = Integer.parseInt(splitedLine[1]);
		
		int ngNum = 0;
		for(int i=0; i<humanNum; i++) {
			splitedLine = sc.nextLine().split(" ");
			String question_result = splitedLine[0];
			int rate = Integer.parseInt(splitedLine[1]);
			
			if(rate < 1200)continue;
			
			for(int j=0; j<4; j++) {
				char c = question_result.charAt(j);

				if('x' == (c)) {
					ngNum += 1;
					break;
				}
			}
		}
		
		System.out.println(ngNum);
		sc.close();
	}
}