#include <iostream>
#include <fstream>
using namespace std;

bool isLetter(char character)
{
    int code=(int)character;
    if((code>=65&&code<=90)||(code>=97&&code<=122))
            return true;
    return false;
}

int main()
{
    ifstream fin("text.in");
    ofstream fout("text.out");
    char currentChar, lastChar='*';
    int charCount=0, wordCount=0;
    fin>>noskipws;
    while(fin>>currentChar)
    {
        if(isLetter(currentChar))
            charCount++;
        else if(isLetter(lastChar))
                wordCount++;
        lastChar=currentChar;
    }
    fout<<charCount/wordCount;
    return 0;
}