#include <iostream>
#include <fstream>
using namespace std;
bool k=false;
string s;
int x,i,n,q;
int main()
{
    ifstream f("text.in");
    ofstream g("text.out");
    getline(f,s);
    n=s.size();
    for(i=0;i<=n;i++)
    {
        if((s[i]>='A' and s[i]<='Z') or (s[i]>='a' and s[i]<='z'))
            {
                x++;
                k=false;
            }
        else
            if(k==false and x>0)
            {
                q++;
                k=true;
            }
    }
    g<<x/q;
    return 0;
}