#include <iostream>
#include <fstream>
#include <cstring>
#include <cctype>

using namespace std;
int main()
{
    ifstream fin("text.in");
    ofstream fout("text.out");
    int i;
    char a;
    int s=0,k=0,ok=1;
    while(fin.get(a))
    {
        if(isalpha(a))
        {
            s++;
            if(ok)
                k++,ok=0;
        }
        else
            ok=1;
    }
        fout<<s/k;
    return 0;
}