#include <cstdio>
using namespace std;
bool litera(char c){
    if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))
        return 1;
    return 0;
}
void cuvant(int &n, char c){
    while (litera(c)){
        n ++;
        c = getc(stdin);
    }
}
int main(){
    freopen("text.in", "r", stdin);
    freopen("text.out", "w", stdout);
    int n, cuv;
    char c;
    c = getc(stdin);
    n = cuv = 0;
    while (c != EOF){
        if (litera(c)){
            cuvant(n, c);
            cuv ++;
        }
        c = getc(stdin);
    }
    printf("%d\n", n / cuv);
    return 0;
}