#include <iostream>
#include <fstream>
using namespace std;
ifstream f("lol.ii");char a[10000];int cv,ch,i;bool st;
int main()
{
    while(f>>a)
        { i=0;st=1;
            while(a[i]!='\0')
            {
                if((int(a[i])>64&&int(a[i])<91)||(int(a[i])>96&&int(a[i])<123))
                    {if(st)
                {
                    st=0;ch++;
                    cv++;
                }
                else
                    ch++;}
                else
                    st=1;i++;
            }
        }
    cout<<ch/cv;
    return 0;
}