#include <bits/stdc++.h>

using namespace std;

int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    char spatiu[]={' ','-'},st=0;
    int s1=0,s2=0;
    string n;
    getline(f,n);
    for (int i=0;i<n.size();++i)
    {
        if (isalpha(n[i])) s1++;
        if (!isalpha(n[i]))
        {
            if (i!=0&&i!=n.size()-1) s2++;
            while (!isalpha(n[i])) i++;
            --i;
        }
    }
    g<<s1/(s2+1);
    return 0;
}