2022-02-14 BOJ 1105

#include<iostream>

using namespace std;

int main() {
	ios::sync_with_stdio(false);
  cin.tie(NULL); cout.tie(NULL);
  
	string a, b;
	int cnt = 0;
  cin >> a >> b; 
  
	if (a.length() != b.length()) {
		cout << 0;
		return 0;
	}

	for (int i = 0; i < a.length(); i++) {
		if (a[i] == b[i] && a[i] == '8') cnt++;
		else if (a[i] != b[i]) break;
	}
  
	cout << cnt;
	return 0;
}