#include <iostream>
#include <fstream>

using namespace std;

int main()
{
    ifstream f("text.in");
    char x;
    int ok=1;
    while(ok)
    {
        f>>x;
        if(x>='A'&&x<='Z' || x>='a'&& x<='z')ok=0;
    }
    ok=1;
    int nc=1;
    while(f.get(x))
    {
        if(x>='A'&&x<='Z' || x>='a'&& x<='z')nc++;
        if(x==' ' || x=='-')ok++;
    }

    ofstream g("text.out");
    g<<(int)nc/ok;
    g.close();
    return 0;
}