#include <iostream>
using namespace std;

int main() {

    int arr[10];

    for (int i = 0; i < 10; i++) {
        cin >> arr[i];
    }

    int size = sizeof(arr) / sizeof(arr[0]);
    int max_count = 0;

    for (int i = 0; i < size; i++) {
        int count = 0;
        for (int j = 0; j < size; j++) {
            if (arr[i] == arr[j]) {
                count++;
            }
        }
        if (count > max_count) {
            max_count = count;
        }
    }

    std::cout << max_count << std::endl;
    return 0;
}