#include <fstream>
#include <cstring>
using namespace std;
ifstream f ("text.in");
ofstream g ("text.out");
char a[100000];
int k, z, n, i;
bool ok = false;
int main()
{
    f.get(a,100000,'\n');
    n = strlen(a);
    for (i = 0; i < n; i++){
        while ((a[i] >= 65 && a[i] <= 90) || (a[i] >= 97 && a[i] <= 122))
        {
            if (ok == false){
                z++;
                ok = true;
            }
            k++;
            i++;
        }
        if (ok == true){
            ok = false;
            i--;
        }
    }
    g << k / z;
    return 0;
}