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

using namespace std;

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

char c;
bool a = 0;
int n, cuv;
int main()
{
    while ( fin.get(c) )
    {
        if ( ( c >= 'a' && c <= 'z' ) || (c >= 'A' && c <= 'Z') )
        {
            if (a == 0)
            {
                a = 1;
                cuv++;
                n++;
            }
            else
                n++;
        }
        else
        a = 0;

    }
    fout << n / cuv;
    return 0;
}