#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    int OK=0,length = 0,nr=0;
    char character;
    fstream f("text.in");
    ofstream g("text.out");
    while(!f.eof()){
            f.get(character);
            if((character>='a' && character<='z') || (character>='A' && character<='Z')){
           OK = 1;
          length++;
           }
           else if((OK==1)){
            nr++;
            OK = 0;
           }
    }
    g<<length/nr;
    return 0;
}