#include <fstream>
using namespace std;
ifstream f("text.in");
ofstream g("text.out");
int main()
{
    char s[256];
    f.getline(s,256);
    int i = 0, nrcuv = 0, nrchars = 0;
    while (!(s[i] >= 'a' && s[i] <= 'z') && !(s[i] >= 'A' && s[i] <= 'Z'))
        ++i;
    while(s[i] != '\0')
    {
        if ((s[i] >= 'a' && s[i] <= 'z') || (s[i] >= 'A' && s[i] <= 'Z'))
            nrchars++;
        else
            nrcuv++;
        i++;
    }
    g << nrchars/nrcuv;
    return 0;
}