#include "bits/stdc++.h"
using namespace std;

int main () {
	 ios::sync_with_stdio(false);
	 cin.tie(nullptr);
	 cout.tie(nullptr);
	 //~ vector<int> a = {1,2,1,2,1,3,5};
	 //~ int n = (int) a.size();
	 //~ int count[6];
	 //~ for (int i = 0; i < 6; ++i) {
		 //~ count[i] = 0;
	 //~ }
	 //~ for (int i = 0; i < n; ++i) {
		 //~ count[a[i]]++;
	 //~ }
	 //~ cout << count[2] << '\n';
	 string s = "abcdddddez";
	 int n = (int) s.size();
	 int count[26];
	 for (int i = 0; i < 26; ++i) count[i] = 0;
	 for (int i = 0; i < n; ++i) {
		 count[s[i] - 'a']++;
	 }
	 cout << count['z' - 'a'] << '\n';
}