import java.io.*;
import java.util.*;

/*
Cамая длинная последовательность
*/

public class Solution {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        ArrayList<Integer> list = new ArrayList<>();
        int [] array = new int[10];
        for (int i = 0; i < 10; i++) {
            int x = Integer.parseInt(reader.readLine());
            list.add(x);
            array[i] = x;
        }
        HashMap<Integer, Integer> map = new HashMap<>();
        int value, counter = 0;
        for (int i = 0; i < array.length - 1; i++) {
            if (array[i] == array[i + 1]){
                value = array[i];
                counter++;
                map.put(value, counter + 1);
            }else{
                counter = 0;
            }
        }
        ArrayList<Integer> l = new ArrayList<>();
        for (Map.Entry<Integer, Integer> pair : map.entrySet()){
            int valueMap = pair.getValue();
            l.add(valueMap);
        }
        Collections.sort(l);
        int result = l.get(l.size() - 1);
        System.out.println(result);
    }
}