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

#define ll long long 
#define fisier 1
const int mxN = 2e5;

int32_t main(){
	#ifdef fisier
        ifstream cin("text.in");
        ofstream cout("text.out");
    #endif

	ios_base::sync_with_stdio(false);
	cin.tie(NULL); cout.tie(NULL);

	char d;
	int n, l, ok = 0;
	while (cin.get(d)){
		if (isalpha(d)){
			l++;
			if (!ok)
				n++, ok = 1;
		}
		else ok = 0;
	}
	cout << l / n;
	//cout << s.size();	
}