#include <iostream>
#include <fstream>
#include <string.h>
using namespace std;
ifstream fin ("text.in");
ofstream fout ("text.out");
char a[1000];
void citire()
{
    fin.get(a,1000);
}
int  nrcuvinte()
{
    int nr=0,i=0;
    while(a[i])
    {
        if((a[i]>='a' && a[i]<='z') || (a[i]>='A' && a[i]<='Z'))
            {
                while((a[i]>='a' && a[i]<='z') || (a[i]>='A' && a[i]<='Z'))
                    i++;
                nr++;
            }
            else
                i++;
    }
    return nr;
}
int lungimetot()
{
    int nr=0,i=0;
    while(a[i])
        {
            if((a[i]>='a' && a[i]<='z') || (a[i]>='A' && a[i]<='Z'))
            {
                while((a[i]>='a' && a[i]<='z') || (a[i]>='A' && a[i]<='Z'))
                    {i++;nr++;}
            }
            else
                i++;
        }
    return nr;
}
int main()
{
    citire();
    if(nrcuvinte()==0)
        {cout<<0;return 0;}
    fout<<lungimetot()/nrcuvinte();
    return 0;
}