#include <stdio.h>

int main(){
    FILE *fin, *fout;
    fin=fopen("text.in", "r");
    fout=fopen("text.out", "w");

    int c, car;
    char k;

    k=fgetc(fin);
    car=1;
    c=1;
    while(k!='\n'){
        k=fgetc(fin);
        if('A'<=k && k<='Z' || 'a'<=k && k<='z')
            car++;
        if(k==' ')
            c++;
    }

    fprintf(fout, "%d", car/c);

    fclose(fin);
    fclose(fout);

    return 0;
}