#include <fstream>
#include <iostream>
#include <string>

using namespace std;

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

int main()
{
    char a;
    int lit,cuv,k;
    lit=0;
    cuv=0;
    k=0;
    while(fin.get(a)){
        if(a>='a'&&a<='z' || a>='A' && a<='Z'){
            lit++;
            k=1;
        }
        else if(k){
            k=0;
            cuv++;
        }
    }
    fout<<lit/cuv<<"\n";
    fin.close();
    fout.close();
    return 0;
}