#include<fstream>
#include<iostream>
using namespace std;
ifstream in ("text.in");
ofstream out ("text.out");
int main (){
    char c;
    int t=0;
    in>>c;
    int suma=0,nr=0;
    while(!in.eof()){
        c=in.get();
        t=0;
        if((c>='a'&&c<='z')||(c>='A'&&c<='Z')){
        suma++;
        nr++;
        t=1;
        }
        while(t==1){
                c=in.get();
                t=0;
        if((c>='a'&&c<='z')||(c>='A'&&c<='Z')){
        nr++;
        t=1;
        }
        }
        if(in.eof())
        break;
    }
    suma=nr/suma;
out<<suma;
in.close();
out.close();
return 0;
}