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

using namespace std;
ifstream fin("date.in");
ofstream fout("text.out");

int main()
{
    char c1,c2;
    int nrlit=0,n=0;
    fin.get(c2);
    if(isalpha(c2)) nrlit++, n++;
    fin.get(c1);
    while(!fin.eof())
    {
        if(isalpha(c1))
        {
            nrlit++;
            if(!isalpha(c2)) n++;
        }
        c2=c1;
        fin.get(c1);
    }
    cout<<nrlit/n;
    return 0;
}