#include <iostream>
#include <fstream>
#include <cctype>
#include <cstring>
#include <algorithm>
std::ifstream fin("text.in");
std::ofstream fout("text.out");
using namespace std;

void Solve()
{
    char ch,prev;
    long long Nr_Letters=0, Nr_Words=0;

    while(fin.get(ch))
    {
        int ascii_ch,ascii_prev;
        ascii_ch=(int)ch, ascii_prev=(int)prev;
        if(isalpha(ch))
        {
            Nr_Letters++;
            if(!isalpha(prev))
                Nr_Words++;
        }
        prev=ch;
    }
    fout<< Nr_Letters/Nr_Words;
}

int main()
{
    Solve();
    fin.close();
    fout.close();
    return 0;
}