import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Collections;

/**
 * Created by Alexander Ressl on 27.04.2018 09:21.
 */
public class StartBits {

    public static void main(String[] args) {
        Level1();
    }

    public static void Level1() {
        int count = 999;
        int imageCount;
        int sizeX = 0;

        ArrayList<Integer> sort = new ArrayList<>();
        boolean inImage = false;
        boolean imageValid = false;
        int puffer = 0;
        try (BufferedReader br = new BufferedReader(new FileReader("resources/lvl1-2.inp"))) {
            String line;
            while ((line = br.readLine()) != null) {
                if (count == 999) {
                    imageCount = Integer.parseInt(line);
                } else {
                    if (!inImage) {
                        puffer = Integer.parseInt(line.split(" ")[0]);
                        count = Integer.parseInt(line.split(" ")[1]);
                        //System.out.println(" --- "  +count);
                       // System.out.println(count);
                        inImage = true;
                    }else{
                        for(String blub : line.split(" ")){
                            int stuff = Integer.parseInt(blub);
                            if(stuff != 0){
                                imageValid = true;
                            }
                        }
                        //System.out.println("line " + line);
                        //System.out.println("count " + count);
                        if(count == 0){
                            System.out.println("ok");
                            if(imageValid){
                                imageValid = false;
                                sort.add(puffer);
                            }
                            inImage = false;
                            continue;
                        }
                    }
                }
                count--;
            }
        } catch (Exception e) {
            System.out.println(e);
            System.out.println("no");
        }
        Collections.sort(sort);
        for(int test : sort){
            System.out.println(test);
        }
    }
}