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

int main()
{
    ifstream in;
    in.open("text.in");
    ofstream out;
    out.open("text.out");
    string str;
    getline(in,str);
    int nr = 0,nr_cuv = 0,ant = 0,i = 0;
    int l = str.length();
    while (i != l){
        int aux = (int)str[i];
        if((aux > 64 &&  aux <91) || (aux > 96 &&  aux <123)){
            nr++;
            if(ant < 65 ||  ant >122 || (ant >90 && ant <97)) nr_cuv++;
        }
        ant = aux;
        i++;
    }
    int media = nr / nr_cuv;
    out << media << endl;
    return 0;
}