import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class MaxTemperature {
	private static final int MISSING = 9999;
	public static void main(String[] args) {
		Scanner s; 
		int max=Integer.MIN_VALUE;
		try {
			s = new Scanner(new File(args[0]));
			while (s.hasNextLine()) {
				String line = s.nextLine();
				// String year = line.substring(15, 19);
				int airTemperature;
				if (line.charAt(87) == '+') { // parseInt doesn't like leading plus signs
					airTemperature = Integer.parseInt(line.substring(88, 92));
				} else {
					airTemperature = Integer.parseInt(line.substring(87, 92));
				}
				String quality = line.substring(92, 93);
				if (airTemperature != MISSING && quality.matches("[01459]")) {
					if(airTemperature>max) max=airTemperature;
				}
			}
			System.out.println(max);
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		}
	}
}