#include<fstream>
#include<iostream>
#include<string.h>
using namespace std;
char s[1073741860];
int main()
{

    ifstream f("text.in");
    ofstream g("text.out");
    int x=0,nr,l;
    char c;
    while(f.get(c))
    {
        if(isalpha(c))
        {
            l++;
            if(x==0)
                ++nr;
            x=1;

        }
        else
            x=0;
    }
    g<<l/nr;
    return 0;
}