#include <bits/stdc++.h>

using namespace std;

char s[2000001];

inline bool Litera(char c)
{
    if (('a' <= c && c <= 'z') ||('A' <= c && c <= 'Z'))
        return true;
    return false;
}

int main()
{
    char ult;
    int i, nrlit, nrcuv;
    ifstream fin("text.in");
    ofstream fout("text.out");

    nrlit = nrcuv = 0;
    while (fin >> s)
    {
        ult = '#';
        for (i = 0; s[i]; ++i)
        {
            if (Litera(s[i]))
            {
                nrlit++;
                if (!Litera(ult)) nrcuv++;
            }
            ult = s[i];
        }
    }
    i = nrlit / nrcuv;
    fout << i << "\n";
    fout.close();
    fin.close();
    return 0;
}