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

using namespace std;

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

int main ()
{
    char ch;
    int lung = 0;
    int cuv = 0;
    char lastCh = '\0';

    while(fin >> noskipws >> ch)
    {
        if(isalpha(ch))
        {
            lung++;
            if(!isalpha(lastCh))
                cuv++;
        }
        lastCh = ch;
    }

    fout << lung / cuv;
}