#include <fstream>
using namespace std;

ifstream fin("text.in");
ofstream fout("text.out");


int main(){
    int cuvinte=1,caractere=0;
    char x;
    while((x = fin.get()) != EOF){
        if(isalpha(x)){ caractere+=1;}
        else if(x==' '){ cuvinte+=1;};
    }
    fout << caractere/cuvinte;
    return 0;
}