#include <bits/stdc++.h>
#define DAU  ios::sync_with_stdio(false); fin.tie(0); fout.tie(0);
#define PLEC fin.close(); fout.close(); return 0;
using namespace std;
ifstream fin("text.in");
ofstream fout("text.out");
char c;
int curr, cnt, sum;
int main()
{
    DAU
    while (fin.get(c))
        if (isalpha(c))
        {
            if (!curr)
                curr = 1, ++cnt;
            ++sum;
        }
        else curr = 0;
    fout << sum / cnt;
	PLEC
}