/*#include <iostream>
#include <fstream>

using namespace std;
char sir[100];
int n=0;
int n_litere_identice(){
    int contor=0;
    for(int i=1;i<=n;i++) {
        //cout<<i<<' '<<n-i+1<<' '<<sir[n-i+1]<<endl;
        if(sir[i]==sir[n-i+1]) {
            contor++;
        }else{
            return contor;
        }
    }
    return contor;
}

int main()
{
    ifstream f("ene.in");
    ofstream g("ene.out");
    char litera;
    while(f>>litera){
        if('A'<=litera && litera<='Z') {
            n++;
            sir[n]=litera;
        }
    }
    g<<n_litere_identice();
    f.close();
    g.close();
    return 0;
}
*/
#include <iostream>
#include <fstream>
#include <string.h>

using namespace std;

int main() {
    ifstream f("text.in");
    ofstream g("text.out");
    char sir[10000000];
    f.getline(sir,10000000);
    int n=strlen(sir),contor_cuvinte=0,contor_litere;
    for(int i=0;i<=n;i++) {
        if(('a'<=sir[i]&&sir[i]<='z') || ('A'<=sir[i] && sir[i]<='Z')) {
            contor_litere++;
        }else if((('a'<=sir[i-1]&&sir[i-1]<='z') || ('A'<=sir[i-1] && sir[i-1]<='Z')) &&!(('a'<=sir[i]&&sir[i]<='z')||('A'<=sir[i] && sir[i]<='Z'))){
            contor_cuvinte++;
        }
    }
    g<<contor_litere/contor_cuvinte;
    f.close();
    g.close();
}