#include <fstream>
#include <string.h>

using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");

char S;

int Litera(char ch)
{
    if(ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z')
    {
        return 1;
    }
    return 0;
}

int main()
{
    bool Cuv = false;
    int K = 0, nrC = 0, nrL = 0;
    while(fin.get(S))
    {
        if(Litera(S))
        {
            if(Cuv)
            {
                nrC++;
                Cuv = false;
            }
            nrL++;
        }
        else Cuv = true;
    }
    fout << nrL / nrC;

    return 0;
}