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

using namespace std;

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

int main()
{
    char a;
    int lit,cuv;
    lit=cuv=0;
    while(fin.get(a)){
        if(a>='a'&&a<='z' || a>='A' && a<='Z')
            lit++;
        else if(a==32)
            cuv++;
    }
    cuv++;
    fout<<lit/cuv<<"\n";
    fin.close();
    fout.close();
    return 0;
}