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

using namespace std;

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char a; int cont=1, k=0;
    while(!('a'<=a&&a<='z')&&!('A'<=a&&a<='Z'))
        f.get(a);
    while(f.get(a))
    {
        if(('a'<=a&&a<='z')||('A'<=a&&a<='Z'))
            cont++;
        else
            k++;
    }
    g<<cont/k;
    return 0;
}