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

ifstream f("text.in"); ofstream g("text.out");

char s[100000005];

int main() {
    f.getline(s,100000005);
    int n,nr,i; bool nou = 1;
    string ss = s;
    n = 0; nr = 0;
    for(i = 0; i <= ss.length()-1; ++i) {
        if (((s[i] >= 'a') && (s[i] <= 'z')) || ((s[i] >= 'A') && (s[i] <= 'Z'))) {
            ++n;
            if (nou) {
                nou = 0;
                ++nr;
            }
        }
        else {
            nou = 1;
        }
    }
    g<<n / nr;
    return 0;
}